He lay down, his pulse thumping.

The next day the ground rose steadily, becoming broken and lifeless. The clear air thinned and grew colder, bitterly cold when the wind from the north blew, despite the brightness of the sun. By now it was obvious there was no threat from Pashtuns or anybody else, and Batson allowed the troops to abandon the slow routine of picketing and march more briskly.

Though Bisesa’s all-weather flight suit kept her reasonably protected, the others suffered. As they struggled into the wind the soldiers wrapped themselves up in their blankets and groused about how they should have brought their winter greatcoats. Both Ruddy and Josh became subdued, locked in themselves, as if the wind was leaching the energy out of them. But nobody had expected these conditions; even old Frontier hands said they had never known such a chill in March.

Still they marched doggedly along. Most of the time even Kipling didn’t complain; he was too cold to bother, he said.

Fourteen of the twenty troopers were Indian. It seemed to Bisesa that the Europeans kept away from the sepoys, and that the Indians had poorer equipment and weapons.

Ruddy said, “Once the proportion of British troops to Indian was about one in ten. But the Mutiny shattered all that. Now there’s one European for every three Indians. The best weaponry, and all the artillery pieces, are in the hands of British troops, though the Indians may be used as muleteers. You don’t want to train up and arm potential insurgents; common sense, that. Remember that the Indian Civil Service employs only about a thousand people—brave men of the plains, all!—to administer a country of four hundred million. It is only the backing of force that enables such a bluff to be played effectively.”

“But that’s why,” she said gently, “you have to train up an Indian elite. This isn’t America, or Australia. There’s no way British colonists or their descendants will ever outnumber the Indians.”

Ruddy shook his head. “You’re talking of our growing crowd of babus— with all respect to yourself! That notion might wash in London, but not here. You must know of Lucknow, where the whites were summarily slaughtered! That’s the tinderbox we’re sitting on. We may be withholding the best guns, but by filling a babu ’s head with visions of liberty and self-determination you are handing him the most potent weapons of all—weapons he isn’t yet mature enough to use.”

Such casual patronizing set Bisesa’s teeth on edge. But she knew that Ruddy was actually representative of his class, if more articulate than most. It was some consolation to her to know that Ruddy was quite wrong about the future—even what would unravel in his own lifetime. The confrontation between Cossacks and sowars in Central Asia, so long feared in London, would never come to pass. In fact Russia and Britain came to be allies in the face of a new enemy common to both, in the person of the Kaiser. The Empire had always been about acquisition and profit, but Britain’s legacy in this region wasn’t all bad. It did leave India with a functioning civil service, and right up to Bisesa’s time India remained the second-largest democracy in the world, second only to Europe. But the well-intended partition imposed when the Raj withdrew caused tensions from the beginning, tensions that resulted in the terrible destruction of Lahore.

That was the old history, though, she reminded herself. Just in the few days they had been here, she thought she detected a change in the sepoys’ attitude. They were not quite so respectful to the whites, as if they now knew something of the future—that babus like Gandhi, and Bisesa herself, would eventually win. Even if time somehow stitched itself back together again, she couldn’t believe that this bit of history, polluted by her own present, could ever be quite the way it had been before.

Soon they found themselves clambering through high-shouldered hills, and as the northern wind was funneled into steep-walled valleys and gorges the going got tougher still. But these were just foothills.

At last they broke through a final cluttered valley, and emerged to face a view of the mountains themselves. The peaks were clad in bright gray-white glaciers that descended from their summits and tumbled down their flanks. Even from here, still kilometers away, Bisesa could hear the groan and crack of the ice rivers as they forced their way down the gouged flanks of the mountains.

They all stopped in their tracks, quite stunned.

“Good God,” said Ruddy. “The sepoys are saying, it wasn’t like this before.”

Bisesa dug out her night-vision goggles, and set them to a binocular setting. She scanned the base of the mountains. Beyond the peaks the ice stretched away, she saw; this was the edge of an ice cap. “I think this is a piece of the Ice Age.”

Ruddy, shivering, had wrapped his arms around his bulk. “Ice Age … Yes … I have heard of the phrase. A Professor Agassiz, I think … controversial idea … Controversial no more, then!”

“Another time slip?” Josh asked.

“Look.” Bisesa pointed at the base of the mountains. The glaciers there came to an abrupt halt, making a cliff. But the glaciers continued to pour off the mountains in their slow, inexorable way, and Bisesa could see how the cliff was splintering, calving off chunks like great landlocked icebergs, revealing clefts of a piercing blue. At the base of the cliff the ice was already melting, and slow floods were seeping out toward the lower ground. “I think that’s another interface. Like the step on the plain. Could be a jump anything from ten thousand years to two million years deep.”

“Yes,” said Josh, his breath steaming. “I see it. Another boundary between worlds—eh, Ruddy?”

But poor nearsighted Kipling could see little through his frosted spectacles.

“We should head back,” Batson said, his teeth chattering. “We’ve seen what we came to see, and can go no further.” The men concurred.

Bisesa’s radio bleeped. She pulled her headset out of her pocket and wrapped it around her head. It was a shortwave message from Casey. One of Grove’s scouting expeditions had spotted what appeared to be an army, a massive one, in the valley of the Indus. And Casey had received a signal on his lashed-up receiving station, he said. A signal from space. Her heart beat faster.

Time to go, then.

Before she turned away Bisesa ran her field of view along that crumbling base of ice, one last time. No wonder the weather was screwed up, she thought. This big chunk of ice wasn’t meant to be here. The cold winds pouring off it would mess up the climate for kilometers around, and when it melted there would be swollen rivers, floods. That was, of course, if things remained stable, and there wasn’t more unraveling of time to come …

She glimpsed movement. She scanned back, upping the magnification. Two, three, four figures walked through the chill blue shadow of the glaciers. They were upright, and wore something dark and heavy, skins perhaps. They carried sticks, or spears. But they were squat, broad, their shoulders massive and rounded, their muscles immense. They were like pumped-up American footballers, she thought; Casey, eat your heart out. Tiny sparks of light, well-spaced, hovered over them: a string of Eyes.

One of the figures stopped and turned in her direction. Had he glimpsed a reflection off her goggles? She tapped the controls, and the magnification zoomed to its limit. The image grew blurred and shaky, but she could make out a face. It was broad, almost chinless, with powerful cheekbones, a forehead that sloped back from a thick brow into a mass of black hair, and a great protruding nose from which steam snorted, white and regular, as if from some hidden engine. Not human—not quite—but still, something atavistic in her felt a shock of recognition. Then the image broke down into a blur of color, white and blue.