Once the sun slipped below the tree-line, the party thinned rapidly; for most of us had become accustomed to a dawn-to-dusk existence. I hailed good night one final time, and retired to the ruins of my improvised still. I sat in the entrance to the lean-to, sipping at the last of my liqueur, and I watched the shadow of the forest sweep across the Palaeocene Sea. Dark shapes slid through the water: rays, perhaps, or sharks.

I thought over my conversation with Nebogipfel, and tried to come to terms with the decision I must make.

After a time, there was a soft, uneven footstep on the sand.

I turned. It was Hilary Bond — I could barely make out her face in the last of the day-light — and yet, somehow, I was not surprised to see her.

She smiled. “Can I join you? Do you have any of that moonshine left?”

I waved her to a place in the sand beside me, and I passed her my shell. She drank with some grace. “It’s been a good day,” she said.

“Thanks to you.”

“No. Thanks to all of us.” She reached out and took my hand — quite without warning — the touch of her skin was like an electric jolt. She said, “I want to thank you for all you’ve done for us. You and Nebogipfel.”

“We haven’t—?”

“I doubt if we’d have survived those first few days, without you.” Her voice, soft and level, was nevertheless quite compelling. “And now, with all you’ve shown us, and all Nebogipfel’s taught us — well, I think we’ve every chance of building a new world here.”

Her fingers were delicate and long against my palm, and yet I could feel the scarring from her burns. “Thank you for the eulogy. But you speak as if we are going away…”

“But you are,” she said. “Aren’t you?”

“You know about Nebogipfel’s plans?”

She shrugged. “In principle.”

“Then you know more than I do. If he has built a Time-Car — where did he get the Plattnerite, for example? The Juggernauts were destroyed.”

“From the wreck of die Zeitmaschine, of course.” She sounded amused. “Didn’t you think of that?” She paused. “And you want to go with Nebogipfel. Don’t you?”

I shook my head. “I don’t know. You know, sometimes I feel old — and tired — as if I have seen quite enough already!”

She snorted her contempt for that. “Baloney. Look: you started it—” She waved a hand. “All of this. Time traveling — and all the changes it’s brought about.” She gazed around at the placid Sea. “And now, this is the biggest Change of all. Isn’t it?” She shook her head. “You know, I’ve had a certain amount of dealing with the strategic planners at the DChronW, and I’ve come away downcast every time at the smallness of the thinking of such types. To adjust the course of a battle here, to assassinate some tin-pot figure there… If you have such a tool as a Chronic Displacement Vehicle, and if you know that History can be changed, as we do, then would you, should you, restrict yourself to such footling goals as that? Why restrict yourself to a few decades, and to fiddling with the boyhood of Bismarck or the Kaiser, when you can go back millions of years — as we have? Now, our children will have fifty million years to remake the world… We’re even going to rebuild the human species — aren’t we?” She turned to me. “But you haven’t reached the end of it yet. What’s the Ultimate Change, do you think? Can you go back all the way to the Creation, and start things all over again from there? How far can this — Changing — go?”

I remembered Gödel, and his dreams of the Final World. “I don’t know how far it can go,” I said truthfully. “I can’t even imagine it.”

Her face was huge before me, her eyes wells of darkness in the deepening twilight. “Then,” she said, “you must travel on and find out. Mustn’t you?” She moved closer, and I felt my hand tighten around hers, and her breath was warm against my cheek.

I sensed a stiffness about her — a reticence, which she seemed determined to overcome, if only by force of will. I touched her arm, and I found scarred flesh, and she shuddered, as if my fingers were made of ice. But then she clasped her hand around mine and held it against her arm. “You must forgive me,” she said. “It is not easy for me to be close.”

“Why? Because of the responsibilities of your command?”

“No,” she said, and her tone made me feel foolish and clumsy. “Because of the War. Do you see? Because of all of those who are gone… It’s hard to sleep, sometimes. You suffer now, not then — and that’s the tragedy of the thing, for those who survive. You feel you can’t forget — and that it’s wrong of you to go on living, even. If you break faith with us who died/ We shall not sleep, though poppies grow/ In Flanders field…”

I pulled her closer, and she softened against me, a fragile, wounded creature.

At the last moment, I whispered: “Why, Hilary? Why now?”

“Genetic diversity,” she said, her breath growing shallow.

“Genetic diversity…”

And soon we traveled on — not to the ends of time — but to the limits of our Humanity, there beside the shore of that primeval Sea.

When I awoke it was still dark, and Hilary had gone.

I came to our old encampment in full daylight. Nebogipfel barely glanced at me through his slit-mask as I entered; evidently he was as unsurprised by my decision as Hilary had been.

His Time-Car was completed. It was a box about five feet square, and around it I saw fragments of an unfamiliar metal: bits, I presumed, of the Messerschmitt, salvaged by the Morlock. There was a bench, lashed up from the wood of the dipterocarps, and a small control panel — a crude thing of switches and buttons — that featured the blue toggle switch which Nebogipfel had salvaged from our first Time-Car.

“I have some clothes for you,” Nebogipfel said. He held up boots, a twill shirt, and trousers, all in reasonable order. “I doubt our colonists will miss them now.”

“Thank you.” I had been wearing shorts made of animal skin; I dressed rapidly.

“Where do you want to go?”

I shrugged. “Home. 1891.”

He distorted his face. “It is lost in the Multiplicity.”

“I know.” I climbed into the frame. “Let us travel forward anyway, and see what we find.”

I glanced, one last time, at the Palaeocene Sea. I thought of Stubbins, and the tame Diatryma, and the light off the Sea in the morning. I knew that I had come close to happiness here — to a contentment that had eluded me all my life. But Hilary was right: it was not enough.

I still felt that great desire for home; it was a call in me along the River of Time, as strong, I thought, as the instinct which returns a salmon to its breeding-ground. But I knew, as Nebogipfel had said, that my 1891, that cozy world of Richmond Hill, was lost in the fractured Multiplicity.

Well: if I could not go home, I decided, I would go on: I would follow this road of Changing, until it could take me no further!

Nebogipfel looked at me. “Are you ready?”

I thought of Hilary. But I am not a man to be doing with goodbyes.

“I’m ready.”

Nebogipfel climbed stiffly into the frame, favoring his badly set leg. Without ceremony, he reached for his panel of controls and closed the blue toggle.