The Last Fast Train to the Past

The buggy hit a rut and Ramona grabbed the side rail without looking up.

That was the thing about her. She could be reading, thinking, scanning the tree line for a shimmer that nobody else would notice, and her body just handled the rest. Thaddeus had watched her catch a falling lantern once on World 112 without breaking a sentence. He had stopped being surprised by Ramona somewhere around the fourth world they'd visited together. He had not, however, stopped watching.

"They're behind us," she said.

Not a question. Not a guess.

Thad already knew. He'd clocked the second buggy the moment it rounded the elm-lined corner two blocks back on Hargrove Street — too deliberate, too steady, keeping exactly the same distance a trained man keeps when he doesn't want to spook his quarry. The late afternoon light of World 54's 1895 was doing what late afternoon light did here — turning everything amber and soft, the gas lamps on Millbrook Avenue just beginning to flicker on, the smell of coal smoke and horse and something faintly floral drifting from the milliner's shop they were rattling past.

A beautiful world, World 54. Gentler than most. The cobblestones were well-kept, the buildings brick and proud, the women on the sidewalk in their high-collared dresses moving with the particular unhurried confidence of people who believed the century they lived in was the finest one yet achieved. They had no idea what rode their streets tonight.

"Two of them in the cab," Thad said, keeping his voice easy, his posture relaxed. A man without a care. "Driver's theirs too."

"Three then." Ramona finally looked up from the small leather-bound journal she carried everywhere — not a travel log, but a record of portals. Locations, behaviors, the way they felt when they opened. Years of notations in her small, precise handwriting. She tucked it inside her coat without being asked. "How far to the station?"

"Six blocks."

"We won't make six blocks."

She wasn't wrong. Thad's hand moved to his jacket, confirming by touch what he already knew was there — the watch-compass on his left side, the satchel wedged between his boot and the footboard, the smaller cloaked detector in his breast pocket running warm and quiet. The detector had been pulsing for the last ten minutes. Keeper Police. At least one of them recent — still carrying the stiffness of someone who hadn't done this enough times to be bored by it.

The buggy lurched around a corner onto Fenwick Road and the pursuing cab matched it without hesitation.

"They're not being subtle anymore," Ramona said.

"No. They've decided." He glanced at her. "Do you feel anything?"

She tilted her head slightly — a gesture he'd come to understand meant she was listening to something nobody else could hear. Ramona didn't find portals the way a navigator finds a destination. She found them the way a musician finds a note that's slightly off. Something in her registered the soft wrongness of a place where time had grown thin, where the membrane between one world and the next had worn through from use or accident or the particular cosmic indifference that scattered portals across history like coins dropped from a careless pocket.

"There's something," she said. "Two streets over. Small. It's old — hasn't been used in a while."

"Can you open it?"

"I can try." She was already reaching into her own coat, producing what looked to anyone watching like a woman checking a small decorative compact. It was not that.

Behind them, the sound changed. The second buggy had picked up speed.

Thad took the reins from their hired driver — a startled young man named Cecil who had absolutely not agreed to this — pressed two silver dollars into his palm, and said, "Get down and walk away, Cecil. Right now. Don't look back."

Cecil, to his eternal credit, did exactly that.

The horse didn't need much convincing. Thad had driven worse, on worlds far less cooperative than this one. He swung them hard left onto a narrow lane called Petticoat Row — lined with fabric shops, all closed at this hour, bolts of cotton and silk dimly visible through dark windows. The cobblestones here were rougher, the lane barely wide enough for a single carriage, and the pursuing cab would have to slow or risk losing a wheel.

"Closer," Ramona said. She wasn't talking to him.

She was talking to the portal.

He had never entirely gotten used to that.

"Twenty seconds," she said. "Then I need you to stop the buggy."

"Stopping a buggy with Keeper Police thirty yards behind us is not my favorite plan."

"It's not a plan," she said, with the faint tone she used when she found him charming and wasn't going to say so. "It's a fact. The portal is fixed. We go to it."

Thad pulled the horse left again, into a small cobbled courtyard behind a closed chandler's shop — wax and wick smell hanging in the cool evening air, a wooden sign creaking above on its iron bracket. The pursuing cab appeared at the lane entrance a moment later, and two men stepped out before it had fully stopped. Long coats. Purposeful walks. One of them had already reached inside his jacket.

Thad stepped down from the buggy. He straightened his coat. He looked at them pleasantly.

"Gentlemen," he said.

"Templeton." The taller one — lean, with the flat affect of someone who had been doing this long enough to find it routine — stopped ten feet away. His partner fanned left, just slightly, the way they were trained to do. "You're going to want to come with us."

"I'm going to want to do a lot of things," Thad agreed. "That's rather the point, isn't it."

Ramona stepped down on the other side of the buggy, quiet as a thought.

The tall Keeper's eyes moved to her, then back to Thad. "We don't have a quarrel with your finder."

"She's not my finder," Thad said. "She's her own."

The courtyard sat still. Somewhere in the city, a church bell began counting the hour. The horse shifted its weight and blew a long breath into the cooling air. The Keeper's partner had moved another step left.

Ramona said, softly: "Now, Thad."

He didn't look for the portal. He didn't need to. He trusted her the way he trusted the watch-compass in his pocket — completely, and with full understanding of exactly what he was trusting.

He stepped to his right.

The world went sideways.

Not violently — it never was, with Ramona's portals. It was more like a sentence that ends in a different language than it began. The chandler's courtyard, the amber lamplight, the two Keeper Police reaching forward with expressions shifting from routine to something considerably less composed — all of it folded away, replaced in the space of a half-breath by —

Light. Flat and white and enormous.

Heat.

The sharp synthetic pop of a paddle striking a ball.

Someone nearby said, "You're up next — doubles, court three!"

Thaddeus Templeton stood at the edge of a pickleball court on World 5839, summer of 2025, squinting in the midday sun. He was wearing a wool vest. Ramona, beside him, was still holding her not-a-compact. Around them, a dozen people in athletic wear milled between courts, someone's portable speaker pushing out something with a cheerful beat, a child on the bleachers methodically destroying a snow cone, a banner overhead reading WELCOME TO THE MILLBROOK SUMMER CLASSIC.

Ramona looked down at her coat.

Thad looked at his wool vest.

A woman with a clipboard and a lanyard bustled past, paused, looked them up and down with the particular tolerance of someone who had seen all manner of eccentric court fashion, and said, "Love the vintage look. Court three, you're on deck."

Ramona turned to Thad.

Thad turned to Ramona.

"Do you know how to play pickleball?" she asked.

"I know how to play," he said, "approximately everything."

She smiled — and there it was, the thing he'd been watching for across four worlds and eleven months and more close calls than he cared to count. That smile.

He reached into the equipment bin beside the court and produced two paddles. He handed her one. She took it without looking, already scanning the far fence line with the quiet, habitual attention of a woman who was never entirely off duty — checking sight lines, reading the space, feeling for the particular atmospheric texture that meant a portal was nearby or recently closed.

Old habit. Good habit.

"Anything?" he asked quietly.

"Not yet," she said. "But there's something interesting near the far baseline."

Thad bounced his paddle once against his palm and looked out at the bright green court, the cheerful crowd, the impossible ordinary Saturday afternoon of World 5839.

"After the match," he said.

"After the match," she agreed.

The ref blew a whistle. They walked onto the court.

The lemonade was exceptional.

Thad hadn't expected that. World 5839 had surprised him in small ways all afternoon — the particular quality of the light, the easy friendliness of strangers, the way the town had arranged itself around its park as though the park were the point of the whole enterprise, which perhaps it was. They had played their pickleball match, won it without drawing too much attention, and spent the rest of the afternoon the way Thad liked best: moving slowly, noticing things, letting a world show itself.

The kiosk was a yellow cart near the edge of the park, run by a man in his sixties who squeezed the lemons himself and did not apologize for the price.

"This is remarkable," Thad said.

Ramona looked at him over her cup. "It's lemonade."

"It is the best lemonade on any world I have visited. I want to make a note of it."

"You're not going to make a note of it."

"I'm making a mental note."

She smiled and looked out across the park — the broad green lawn, the families on blankets, a kite climbing clumsily into the blue summer sky. Thad watched her watching it and thought, not for the first time, that Ramona had a gift beyond portals. She could be entirely present in a world.

Some Travelers never managed that. They were always already somewhere else in their heads, scanning for the next jump. Ramona could sit in a moment and mean it.

Her hand rested on the small table between them, close to his. Neither of them mentioned it.

He was about to say something — he wasn't sure what, something that had been sitting at the back of his throat for eleven months — when he saw them.

Four of them. Moving in from different angles across the park, the way a net moves when someone draws it closed. Long sleeves despite the heat. That particular walk — unhurried, deliberate, each step placed with the confidence of people who expected the world to hold still for them. His cloaked detector had gone warm in his breast pocket a moment before his eyes confirmed it.

Keeper Police.

The target was a young man sitting alone on the grass near the fountain — nineteen, maybe twenty, dark-haired, wearing the slightly-too-casual expression of someone trying very hard to look like he belonged somewhere. He had a paper cup of something cold and a phone he wasn't really looking at. His eyes kept moving in the careful way a Traveler's eyes move when they're watching for threats and hoping not to find any.

He hadn't seen them yet.

Thad had been on enough worlds, in enough times, to take Keeper Police in stride. They went where Travelers went. That was the nature of things. But here, on this cheerful Saturday afternoon with families and kites and a man selling exceptional lemonade, they were barely pretending. No cover. No attempt to blend. They were simply closing in, in broad daylight, as though this park and everyone in it belonged to them.

That was new. That was something worth noting more than the lemonade.

"I see them," Ramona said quietly, without looking at him.

"The boy hasn't."

"No." A pause. "There's a portal. About two hundred yards, past the bandstand, along the east fence."

"Open?"

"It will be." She set down her cup and stood, smoothing her coat with the air of a woman who had somewhere to be. "I'll be at the fence when you get there."

"Take your time with the lemonade."

"I haven't finished mine."

"Take it with you."

She picked up her cup and walked away across the grass without hurrying. That was the thing about Ramona — she never looked like she was running even when everything depended on speed.

Thad dropped some bills on the table, a little more than the cups had cost, and walked toward the fountain.

The Keepers had maybe forty seconds on him. The boy had less than that before one of them got close enough to make a quiet scene in the middle of a public park on a summer afternoon — which they would do without hesitation, Thad knew, because they always did. They had long since stopped worrying about witnesses.

He angled his approach so he came at the boy from the side, away from the nearest Keeper, and sat down in the grass beside him with the relaxed ease of an old friend arriving late.

The boy's eyes went sharp immediately. Good instincts.

"Don't look around," Thad said pleasantly, as though commenting on the weather. "Four of them. They're about thirty seconds from making your afternoon very unpleasant."

"I don't know what you—"

"Yes you do." Thad reached into his jacket. Smooth, unhurried, the way you reach for something you've reached for a thousand times. He opened his hand just enough for the boy to see what rested in his palm — a small device, dull gray, no bigger than a pocket watch, emitting the faintest pulse of light that no one without the right eyes would notice.

The boy went still.

"Modern?" he said, barely a breath.

"Very." Thad closed his hand. "I have a portal waiting. Two hundred yards. My partner is there now." He looked at the boy directly for the first time. "I'm going to cloak us both and we're going to walk to that portal. Not run. Walk. Running draws attention that a cloaking device doesn't fully cover. Do you understand?"

The boy nodded once. His paper cup crinkled in his grip.

"What's your name?"

"Eli."

"Thaddeus." He didn't extend a hand — no time for that. "Stay close. Match my pace. Don't look at them."

He activated the device.

The cloak didn't announce itself. There was no shimmer, no dramatic effect — just a subtle shift in the air around them, the way a room changes when someone closes a window. The world kept going. Children laughed. The kite dipped and rose. The man at the yellow cart squeezed another lemon. And four Keeper Police closed in on a patch of empty grass beside the fountain, their purposeful walks stuttering, their eyes moving across the space where two people had been sitting with the flat, contained frustration of professionals confronting something they couldn't explain but absolutely recognized.

Thad stood up.

Eli stood up beside him.

They walked.

Past a family setting out a picnic. Past a dog asleep in the sun. Past a little girl who looked up briefly with the unfiltered curiosity of someone very young, then lost interest. Children sometimes caught the edges of a cloak. Thad had always thought that said something worth knowing.

"Eyes forward," he said quietly.

"I know," Eli said. His voice was steadier than Thad had expected. Good.

Behind them, one of the Keepers said something short and sharp to another. Thad didn't turn around.

The bandstand passed on their left — white painted wood, a small stage empty on a Saturday afternoon, bunting left over from something civic and cheerful. The east fence came into view ahead, a low iron thing with trees pressing against it, and Ramona was there, standing in the dappled shade with her cup of lemonade and her not-a-compact open in her other hand, looking for all the world like a woman enjoying the edge of a park on a summer afternoon.

Her eyes found Thad's as they approached. She glanced once at Eli. He saw the slight nod she gave — assessment, acceptance — and felt the particular satisfaction of watching two capable people recognize each other without needing words.

"Thirty seconds," she said.

The portal was there. Thad couldn't see it — he never could, that was her gift, not his — but he trusted the way she angled her body toward a specific gap in the air between two oak trees, the way her hand moved almost imperceptibly with the not-a-compact, the way she tilted her head with that listening expression.

Behind them, raised voices now. The Keepers had figured out the direction if not the method.

"Eli," Thad said. "Have you jumped before?"

"A few times. Old tech."

"This will feel different. Smoother." He glanced at Ramona.

"Now," she said.

The summer afternoon folded.

* * *

The cold hit first.

Not bitter — spring cold, the kind that carries the memory of winter without the weight of it. A breeze with something clean in it, grass and soil and somewhere nearby, something in bloom.

They were standing on a bare hill.

Not bare in the way of a park lawn — bare in the way of a place that had never been asked to be anything other than a hill. Rough grass, pale green, moving in long waves under a wide sky. Below them, a shallow valley, a thread of river catching the light. In the far distance, the dark suggestion of a forest. No roads. No buildings. No sound except the wind and, somewhere below, a bird making an argument with itself.

World 47310. Spring, 1656.

Eli turned a slow circle, taking it in. His paper cup was still in his hand. He looked at it, seemed to register how absurd that was, and set it carefully in the grass.

"Where are we?" he said.

"Somewhere safe," Thad said. "For the moment."

Ramona had already moved a few steps down the hill, looking out over the valley with the particular attention she gave to new places — reading the land the way she read everything, looking for the soft wrongness that meant a portal, or the lack of it that meant they were on their own here for a while.

"Any company?" Thad asked her.

"Not nearby." She turned back. The wind moved her hair. "We have time."

Eli was looking at both of them with the expression Thad had seen before on young Travelers — that specific mixture of relief and vertigo and the dawning understanding that the world, or rather the worlds, were considerably larger and stranger than even a Traveler expected when they were starting out.

"You're a Rescuer," Eli said. Not a question.

"I am."

"I've heard of you." He looked at Ramona. "Both of you."

Ramona glanced at Thad with an expression he couldn't quite read, though he was getting better at it.

Thad settled himself on the hillside grass, unbothered by the cold, and looked out over the valley of World 47310 in the spring of 1656 — untouched, unhurried, entirely indifferent to Keeper Police and pickleball courts and the best lemonade on any world he had ever visited.

"Sit down, Eli," he said. "Tell us how you found yourself alone on World 5839 with four Keeper Police taking an interest in your afternoon."

The young man sat.

Below them, the river caught the light, and the bird made its argument, and the hill held them all without asking any questions of its own.

Eli was looking at the valley when Ramona said, "There's a portal six feet to your left."

He stepped sideways instinctively, then stopped. "Where?"

"Right where you were standing."

He looked at the empty air. Nothing. "I don't see anything."

"Nobody does at first. Most people never do." She sat down in the grass. "Sit down."

He sat.

"Portals are everywhere," she said. "Always open. You've walked through a hundred of them in your life without knowing it. Most people walk through them and nothing happens because they don't know where they want to go. The portal doesn't care. It just sits there."

Eli looked at the spot where he'd been standing. Still nothing.

"Three things tell you one is there," Ramona said. "The pineal notices it first. Not a sound, not a sight — just a change. Something that says this spot is different from the spot next to it. The thyroid checks — is this normal? It isn't. And the hypothalamus tells you how close." She looked at him. "You've felt all three before. You just didn't know what you were feeling."

Eli thought about it. "The fountain. On World 5839. Before I even sat down."

"That was ours. You felt it and thought it was nothing."

He was quiet for a moment. Then he looked around the hill — not searching, just paying attention. The way you pay attention when you think you heard something in the next room.

"The two stones," he said. "Behind us."

"That's the one we came through."

"And the one to my left?"

"Goes somewhere cold. I wouldn't use it today."

Thad smiled and said nothing.

"The tools tell you where to get off," Ramona continued. "World, time — you set that before you go through. Without the tools you're stepping through a door with no idea what's on the other side." She held up the not-a-compact. "This reads the portal and lets me set the destination. That's the other half of it."

Eli nodded slowly, still looking at the empty air six feet away.

Then Thad's wrist went warm.

Three short pulses. One long.

He checked the device. Read the message. Looked at Ramona.

"It's your father."

She went still.

"He's all right," Thad said. "But he needs help. Same world, different time. Fall, 1952."

"What's he doing on 47310?"

"He found Marcus."

Ramona stood. Her face didn't change much but everything behind it did. Her uncle Marcus. Two years since the Keepers took him. Two years of not knowing where.

"The virus?" she said.

"Yes. Pete went in after him. There's a portal in the prison yard." He paused. "He can't get Marcus out alone."

"Marcus doesn't know him anymore," she said quietly.

"No."

Eli was already on his feet. Thad looked at him, then at Ramona. She was already working the not-a-compact, reading the hill around them.

"Same portal we came through," she said. "I can set it for 1952." She walked thirty feet south along the hill and stopped. "Here. This is the other end of the yard portal. We go in here, we come up inside."

Thad looked at the fence below, the watchtowers, the grey buildings. Then he turned to Ramona and Eli.

"I have to go in alone," he said. "Cloaked, nobody can see me. Pete is already in there cloaked. I won't be able to see him either. My only option is to get Marcus into this portal. That's it. That's the whole plan."

"And us?" Ramona said.

"You and Eli wait inside the portal. When Marcus comes through you'll be there."

Ramona looked at Thad the way she sometimes looked at him — the expression he still couldn't fully read, though he was getting better at it.

"Don't be long," she said.

Thad took the cloaking device from his satchel. Checked it. Looked at Eli. "Stay with her. Do what she says."

Eli nodded.

Ramona set the not-a-compact. She and Eli stepped into the portal and were gone.

Thad stood alone on the hill for a moment. The river moved below and the bridge sat solid across it and beyond the fence the grey buildings held whatever they held.

He activated the cloak and stepped through.

* * *

The prison yard was cold and grey and smelled of coal smoke and wet concrete. 1952 on World 47310 had not been kind to this particular piece of it. The yard was enclosed on all sides — fence, buildings, watchtowers — and a dozen men moved through it in the slow disconnected way of people who had forgotten they were supposed to want something.

Thad stood still and looked at them.

One of them was Marcus Clark.

He found him by the far fence, sitting on a concrete step, staring at nothing. He had Pete's jaw, Ramona's eyes. He looked sixty years old. He wasn't.

No sign of Pete but Pete was here somewhere, cloaked and invisible.

Thad moved close to Marcus and stood there. He didn't speak. He didn't reach for him. He just settled into the quiet around the man and waited.

The virus had taken a great deal. But not everything. Not yet. Somewhere inside Marcus Clark there was still a thread — the remnant of someone who had spent a lifetime knowing where portals were without being told.

Thad simply stood at the edge of that thread and waited.

Marcus's head came up.

He looked at nothing in particular. Then he stood.

He walked. Slow, unsteady, but he walked — across the yard toward the northeast corner, toward something he couldn't name but couldn't ignore. Thad stayed beside him. The guards didn't turn. The watchtower didn't move.

Ten feet from the portal Marcus slowed.

Thad waited.

Marcus took the last ten feet on his own.

He stepped through and was gone.

Thad followed. And from somewhere at his left shoulder, close enough that Thad could feel the displacement in the air, Pete Clark followed too.

* * *

Ramona was there.

Marcus came through first and she caught him — both hands, steady, the way you catch someone who doesn't know they're falling. She said his name once. He looked at her with emptied eyes and then something moved in them, the way light moves when a cloud shifts, and he said her name back like a word he'd almost lost.

Thad uncloaked.

Beside him Pete Clark uncloaked.

For a moment nobody said anything. Pete looked at his brother and his brother looked at Ramona and Ramona held on.

Eli stood to one side, very still, watching all of it.

Pete looked at Thad.

"Took you long enough," he said.

"You're welcome, Pete," Thad said.

Pete glanced at the small device in his hand.

"Ramona, coordinates are set for Agnes's house. Your mother will be there too." He looked at his brother. "As soon as we get there the world will take care of you." He pocketed the device. "Let's go."

Ramona set the not-a-compact.

They went through one at a time. Pete first. Then Marcus. Then Eli. Then Thad, who stepped through last.

321 Lumina received them the way it received everyone — without ceremony, without announcement. Just a shift in the air and suddenly everything was different. Warmer. Lighter. The kind of light that seems to come from everywhere at once rather than from any particular direction.

They were standing on a quiet street. Linden trees. Stone steps. A small house with the front door already open.

Agnes came out of that door at a run.

She reached Marcus and took his face in both hands and looked at him. Not frantically. Steadily. The way you look when you have been waiting long enough that you need to be sure before you believe it.

Marcus looked back at her.

Behind Agnes, Julie appeared in the doorway. She came down the steps and went straight to Pete. Then to Ramona.

The street was quiet. The linden trees moved. 321 Lumina went about its business around them, unhurried, unconcerned, already doing what it did — the happy thought particles in the warm air finding Marcus Clark and beginning their work without being asked.

321 Lumina Revealed

They gave him time.

That was the thing about 321 Lumina. Nobody rushed. The world didn't rush. The particles didn't rush. They simply surrounded Marcus Clark with everything he had ever chosen to be and waited for him to remember he had chosen it.

He and Agnes sat in the garden every afternoon. The linden tree at the edge of it threw good shade and the light that came through the leaves was the particular gold of a world that wanted you to be comfortable. A small table. Two chairs. Tea that Agnes made the way she had always made it.

On the third day Marcus said, "Do you remember our first portal?"

Agnes looked at him.

"The apricot tree," he said. "In my backyard. Our friends were on the trampoline and we slipped behind the tree." He smiled at the middle distance. "Like a dream. We went downtown. There was a carnival. We got all sorts of free stuff. We were there for hours. You got a blue teddy bear."

Agnes was quiet for a moment. Then she said, "We tried to find it again. And we couldn't."

Marcus nodded slowly.

"We found one in my backyard," Agnes said. "All we had to do was stand on the big rock. We spent all summer traveling."

Marcus turned and looked at her. Really looked at her. The careful distant expression had shifted into something warmer and more present.

"All summer," he said.

"All summer," Agnes said.

Pete was sitting on the back steps ten feet away pretending to read. He wasn't reading. He set the book down and looked at his brother and didn't say anything at all.

321 Lumina Revealed

Eli had never seen anything like it.

He had been on enough worlds now to know that every world had its own texture — its own smell, its own quality of light, its own way of being itself. But 321 Lumina was different from anything he had a category for.

"What is this place?" he said to Thad.

"Walk with me," Thad said.

They walked.

One street over from Agnes's 1938 the world shifted and they were in something that felt like 1962 — a record store, a coffee shop, a woman in a yellow dress walking a small dog on a leather leash. Music coming from somewhere. The particular confident optimism of a decade that hadn't run out of hope yet.

One street beyond that something older. Cobblestones. Gas lamps. A tailor's shop with a hand-lettered sign. A man in a waistcoat sitting outside reading a newspaper that Eli couldn't quite date but felt like somewhere in the 1890s.

And beyond that something Eli had no time period for at all — clean and quiet and humming with a technology so unobtrusive it took him a moment to realize it was there.

"Every Traveler who retires here chooses their time," Thad said. "And the world accommodates them. All of it coexisting. All of it chosen."

Eli stopped walking. "How?"

Thad considered this. "You know what this world is made of?"

"Ramona mentioned something. Happy thought particles."

"Everything here chooses the form that makes you happy. The cobblestones choose to be cobblestones because the Traveler on that street loves cobblestones. The record store chooses to be a record store. The coffee chooses to be good." He paused. "Nothing here is forced into anything. Not the people. Not the world. Not the matter itself."

Eli looked at the street around him. The gas lamp. The coffee shop. The clean quiet hum of the newest realm just visible at the end of the block.

"The Keepers," he said.

"Can't function here. Their entire system runs on forcing their will onto others. On a world where nothing can be forced —" Thad left it there.

"They'd have nothing," Eli said.

"They'd have nothing."

They walked a little further in silence. A woman came out of the tailor's shop and nodded pleasantly at them in a language the cloaked interpreter rendered without effort. Eli nodded back.

"How many worlds like this are there?" he said.

"Twenty two found so far," Thad said. "That's what the Explorers do. They go looking for more."

Eli looked at him. "Is that why you and Ramona are taking the Explorer course?"

Thad smiled and said nothing.

Which was answer enough.

The Courses

The training center lived in the newest realm.

It didn't look like much from the outside — a low building on a quiet street, clean lines, nothing announcing itself. But inside it ran on the same principle as everything else on 321 Lumina. The rooms arranged themselves around what you needed to learn. The materials chose to be useful. The technology chose to be understood.

There were three courses. Everyone on 321 Lumina knew what they were. Every Traveler who had ever been rescued, every Explorer who had ever found a new safe world, every Hunter who had ever stopped a Spreader in his tracks — they had all come through one of these three doors.

The Rescuer Course trained pairs to go in after captured Travelers. The work Thad did. The work Pete and Julie did. Getting into places that didn't want you in them and getting people out who sometimes didn't know they needed to go.

The Hunter Course trained pairs to find and stop Spreader Keeper Police — the ones who traveled specifically to seed new Keeper colonies across new worlds. The most dangerous work of the three. The Hunters didn't talk about it much.

The Explorer Course trained pairs to find regenerative worlds. Twenty two had been found. Every one of them a victory. Every one of them a world that had chosen to be what it was and was waiting for someone to find it.

Eli and Jill reported to the Rescuer Course on the first morning.

Their instructor was a compact woman named Dara Osei who had been running Rescuer pairs for longer than either of them had been traveling. She looked them over once and said, "You already know the basics. We're going to make the basics automatic so you can think about something else when it matters."

On the third day she produced two small canisters.

"Spray on communicators and interpreters," she said. "Hold out your wrists."

Eli looked at the canister. "What does it do?"

"It chooses to stay," Dara said. "Once it's on it's permanent. No dials. No devices. No fumbling in the dark looking for a tool. You think and it interprets. You need to communicate and it communicates." She looked at him evenly. "The technology is made here. On this world. The particles choose to be what they are because they're happy to be useful."

Jill held out her wrist without hesitation.

Eli held out his.

The spray was cool and left no mark. Within a minute Eli heard Dara say something in a language he didn't recognize and understood every word of it perfectly.

He looked at Jill.

Jill looked at him.

"Better," Dara said, in three languages simultaneously.

Across the building in the Explorer Course, Thad and Ramona were learning something considerably stranger.

Their instructor was a tall quiet man named Joseph Adeyemi who spoke slowly and chose his words with the care of someone who understood that the wrong word in this particular class could send a student in entirely the wrong direction.

"A regenerative world is not a place," he said on the first day. "It is a being. It has awareness. It has preference. It responds." He looked around the room. "Your job as an Explorer is not to find these worlds. Any Traveler with good instincts can stumble onto one. Your job is to communicate with them. To introduce yourself. To let the world know what you are and what you stand for."

"How?" someone asked.

"The same way you communicate with anything that is alive and aware," Joseph said. "You show up honestly. You don't force. You don't demand. You simply make yourself available and you wait for the world to respond."

Ramona leaned slightly toward Thad.

"He sounds like you," she said quietly.

Thad said nothing but the corner of his mouth moved.

"When a regenerative world recognizes a Traveler," Joseph continued, "it responds with what we call an accommodation. The particles shift. The light changes. You will feel it before you see it. The pineal first. Then the thyroid. Then the hypothalamus." He paused. "You already know this feeling. You have felt it every time you found a portal. A regenerative world is simply a portal that encompasses everything."

The room was very quiet.

Ramona looked at Thad.

Thad looked at Ramona.

A portal that encompasses everything.

The Graduation Celebration

321 Lumina chose to celebrate.

That was the only way to describe it. Nobody organized the lights that appeared in the linden trees along Agnes's street. Nobody arranged the tables that found themselves on the wide plaza in the newest realm where all three courses had agreed to hold the ceremony together. The world simply knew what was happening and chose to make it beautiful.

Every Traveler on 321 Lumina came. The ones in their chosen times stepped out of their 1938s and their 1962s and their cobblestoned 1890s and walked to the newest realm together. A Japanese woman in a silk kimono stood next to a man in a 1970s leather jacket stood next to a couple in Victorian dress stood next to three people in clothing that had no century Eli could name. The spray-on interpreters handled everything without effort. Everyone understood everyone. Nobody found this remarkable because on 321 Lumina it was simply how things were.

The Hunter Course graduated first.

Dara Osei read the names.

Viktor Sokolov and Zainab Malik. Gabriel Santos and Chiara Russo. Hamid Karimi and Freya Nielsen. Jerome Baptiste and Yuna Park. Aleksei Morozov and Nkechi Obi. Sean Murphy and Layla Mansour. Hiroshi Tanaka and Valentina Cruz. Emmanuel Osei and Katja Bergström. Louis Marchand and Sunita Rao. Andile Dlamini and Rosa Delgado. Finn Eriksson and Amara Coulibaly. Jackson Mwangi and Petra Novotný.

Twenty four Hunters. Every one of them an empty nester. Every one of them someone who had raised a family and come out the other side and found they still had something left to give and knew exactly what to give it to. They stood together and the plaza stood with them and the happy thought particles in the warm air chose to feel like pride because that was the accurate thing to feel.

The Rescuer Course graduated second.

Felix Wagner and Adaeze Eze. Tariq Hassan and Mei Lin. Carlos Vega and Asha Nair. Ivan Petrov and Yewande Adeyemi. Patrick O'Brien and Hana Suzuki. Kofi Mensah and Elena Vasquez. Antoine Dubois and Nadia Okonkwo. Rajan Sharma and Astrid Holm. Ben Kimani and Lucia Fernandez. Matteo Romano and Keiko Yamamoto. Oscar Lindqvist and Amina Traoré.

And then Dara Osei looked up from her list and said two more names.

Eli Follansbee and Jill Chen.

Eli stood very straight. Jill stood beside him. They were the youngest pair in the room by twenty years and neither of them looked away.

Pete and Julie were in the fourth row. Pete watched Eli cross the plaza and thought about a young man sitting alone by a fountain on World 5839 with four Keeper Police closing in and a paper cup crinkled in his grip. He said nothing about this to Julie. She already knew.

The Explorer Course graduated last.

Joseph Adeyemi read the names slowly, the way he did everything.

James Okafor and Selin Yıldız. Rafael Montoya and Ingrid Solberg. Kwame Asante and Mira Patel. Thomas Brennan and Yuki Tanaka. Diego Reyes and Fatima Al-Rashid. Nikolai Volkov and Amara Diallo. Chen Wei and Brigitte Moreau. Samuel Abebe and Priya Krishnan. Omar Khalil and Sofia Andersen. Henrik Larsen and Zara Osei. Marco Ferretti and Lena Novak. David Nakamura and Grace Mwangi.

And then he said two final names.

Thaddeus Templeton and Ramona Clark.

The plaza responded the way 321 Lumina responded to things it approved of — the light shifted, the warm air moved, the particles chose a configuration that felt like joy because joy was the accurate thing.

Marcus Clark was on his feet before anyone else.

The Wedding Celebration

321 Lumina chose to outdo itself.

The street in front of Agnes's house was the same street it had always been — linden trees, stone steps, warm light coming from everywhere at once. But the world had added something. The particles had conferred among themselves and decided that this particular occasion called for flowers. Not planted flowers. Not arranged flowers. Flowers that simply chose to be there, growing out of every crack in every stone, climbing every wall, appearing in colors that had no names in any language the interpreters knew.

Agnes noticed them first thing in the morning and said nothing. She went inside and made tea.

The ceremony was held in the garden behind the house where Marcus had sat every afternoon under the linden tree finding his way back to himself. He was himself now. Fully, completely, unhurriedly himself. He stood next to Pete in the garden and Pete handed him a cup of tea and they stood together the way brothers stand when they have been through something that doesn't need to be named.

Julie and Agnes sat in the front row. Julie was wearing something from her chosen 1962 that was exactly right for the occasion. Agnes was wearing something from her chosen 1938 that was equally right. Neither of them had coordinated this. 321 Lumina had simply made both choices feel correct.

The seventy two graduates filled the garden and spilled out onto the street and the world accommodated all of them without effort, expanding the space the way it expanded anything that needed expanding, because it was happy to.

Eli and Jill stood together near the linden tree.

Thaddeus Templeton stood at the front of the garden.

Ramona Clark came through the back door of Agnes's house on her father's arm.

Pete walked his daughter across the garden the way a man walks when he is trying to hold two things at once — the pride of the moment and the knowledge of what it means. Ramona walked beside him the way she walked everywhere — like a woman who knew exactly where she was going and had already checked for portals along the way.

She reached Thad and Pete put her hand in his and stepped back.

Thad looked at Ramona.

Ramona looked at Thad.

Twenty-six months and forty worlds and more close calls than either of them cared to count had come down to this garden on this world on this afternoon. The particles paid attention. The flowers chose to be a little brighter. The light that came from everywhere at once chose to come from this particular spot most of all.

The ceremony was simple. No speeches longer than necessary. No decoration for its own sake. Just two people who had been almost saying something for a very long time finally saying it in front of everyone they loved.

When it was done Marcus Clark made a sound that was half laugh and half something else entirely and Agnes put her hand on his arm and the garden full of Travelers from every world and every time responded the way 321 Lumina responded to things it found true and good and worth celebrating.

Pete caught Thad's eye from across the garden.

"Took you long enough," he said.

Thad laughed. The first real unguarded laugh Ramona had ever heard from him. She filed it away alongside the other things she had collected over eleven months — the way he reached for the watch-compass before he reached for anything else, the way he said approximately everything, the way he stepped to his right without looking back.

She would have a forever to collect more.

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