I explained my opinion of the ship’s logic.

“That is a strange designation,” said the ship. “While I have certain organic elements incorporated into my substructure and decentralized DNA computing components, I am not—in the strictest sense of the term—a biological organism. I have no digestive system. No need for elimination, other than the occasional waste gas and passenger effluvium. Therefore, I have no anus in either real or figurative terms. Therefore, I hardly believe I could qualify to be called an…”

“Shut up,” I said.

The slide takes less than fifteen minutes. I brake cautiously as the great wall of the K’un Lun Ridge approaches.

For the last few hundred meters, my shadow—and A. Bettik’s—is thrown ahead of us against the orange-glowing vertical expanse of rock and we become shadow puppets—two strange stick figures with flailing appendages as we work the riser rings to brake our descent and swing our legs to brace for landing. Then the pulley brake sound grows from a low hum to a loud groan as I slow for the final approach to the landing ledge—a six-meter slab of stone with the back wall lined with padded zygoat fleece made brown and rotten by the weather.

I slide and bounce to a stop three meters from the wall, find my footing on the rock, and unclip my pulley and safety line with a speed born of practice. A. Bettik slides to a stop a moment later. Even with one hand, the android is infinitely more graceful than I on the cables; he uses up less than a meter of landing run-out.

We stand there a minute, watching the sun balance on the edge of Phari Ridge, the low light painting the ice-cone summit rising above the jet stream to the south of it. When we finish adjusting our harnesses and equipment racks to our liking, I say, “It’s going to be dark by the time we get into the Middle Kingdom.”

A. Bettik nods. “I would prefer to have the slideway behind us before full darkness falls, M. Endymion, but I think that this will not be the case.”

Even the thought of doing the slideway in the dark makes my scrotum tighten. I wonder idly if a male android has any similar physiological reaction. “Let’s get moving,” I say, setting off down the slab ledge at a trot.

We lost several hundred meters of altitude on the cableway, and we will have to make it up now. The ledge soon runs out—there are very few flat places on the peaks of the Mountains of Heaven—and our boots clatter as we jog down a bonsai-bamboo scaffold walkway that hangs from the cliff wall and juts out over nothing. There is no railing here. The evening winds are rising and I seal my therm jacket and zygoat-fleece chuba as we jog along. The heavy pack bounces on my back.

The jumar point is less than a klick north of the landing ledge. We pass no one on the walkway, but far across the cloud-stirred valley we can see the torches being lit on the Walk Way between Phari and Jo-kung. The scaffold way and maze of suspension bridges on that side of the Great Abyss is coming alive with people heading north—some undoubtedly headed for the Temple Hanging in Air to hear Aenea’s evening public session. I want to get there before them.

The jumar point consists of four fixed lines running up the vertical rock wall for almost seven hundred meters above us. These red lines are for ascension. A few meters away dangle the blue lines for rappelling from the ridge summit. Evening shadow covers us by now and the rising winds are chill. “Side by side?” I say to A. Bettik, gesturing toward one of the middle ropes.

The android nods. His blue countenance looks precisely as I had remembered it from our trip out from Hyperion, almost ten of his years ago.

What did I expect—an android to age? We remove our powered ascenders from our web racks and clip on to adjoining lines, shaking the hanging microfiber lines as if that will tell us if they are still anchored properly. The fixed ropes here are checked only occasionally by the cablemasters; they could have been torn by someone’s jumar clips, or abraided by hidden rock spurs, or coated with ice. We will soon know.

We each clip a daisy chain and etriers to our powered ascenders. A. Bettik unloops eight meters of climbing line and we attach this to our harnesses with locking carabiners. Now, if one of the fixed lines fails, the other person can arrest the first climber’s fall. Or so goes the theory.

The powered ascenders are the most technology owned by most citizens on T’ien Shan: powered by a sealed solar battery, little larger than our hands that fit in the molded grips, the ascenders are elegant pieces of climbing equipment. A. Bettik checks his attachments and nods. I thumb both of my ascenders to life. The telltales glow green. I jumar the right ascender up a meter, clamp it, step up in the looped etrier foothold, check that I am clear, slide the left ascender up a bit farther, clamp it tight, swing my left foot up two loops, and so on. And so on for seven hundred meters, the two of us pausing occasionally to hang from our etriers and look out across the valley where the Walk Way is ablaze with torches. The sun has set now and the sky has darkened immediately to violets and purples, the brightest stars already making an appearance. I estimate that we have about twenty minutes of real twilight left. We will be doing the slideway in the dark.

I shiver as the wind howls around us.

The fixed lines hang over vertical ice for the last two hundred meters. We both carry collapsible crampons in our rack bags, but we do not need them as we continue the tiring ritual—jumar—clamp—step—pull etriers free—rest a second—jumar—clamp—step—pull—rest—jumar. It takes us almost forty minutes to do the seven hundred meters. It is quite dark as we step onto the ice-ridge platform.

T’ien Shan has five moons: four of them captured asteroids but in orbits low enough to reflect quite a bit of light, the fifth almost as large as Old Earth’s moon, but fractured on its upper right quadrant by a single, huge impact crater whose rays spread like a glowing spiderweb to every visible edge of the sphere. This large moon—the Oracle—is rising in the northeast as A. Bettik and I walk slowly north along the narrow ice ridge, clipping on to fixed cables to keep from being blown away by the sub-zero winds that hurtle down from the jet stream now.

I have pulled up my thermal hood and dropped my face mask into place, but the freezing wind still burns at my eyes and any bits of exposed flesh. We cannot tarry here long. But the urge to stand and gaze is strong in me, as it always is when I stand at the cableway terminus of K’un Lun Ridge and look out over the Middle Kingdom and the world of the Mountains of Heaven.

Pausing at the flat, open icefield at the head of the slideway, I pivot in all directions, taking in the view. To the south and west across the moonlit churn of cloudtops so far below, the Phari Ridge glows in the light of the Oracle. Torches high along the ridge north of Phari clearly mark the Walk Way, and I can see the lighted suspension bridges much farther north. Beyond Phari Marketplace, there is a glow in the sky and I fancy that this is the torchlit brilliance of Potala, Winter Palace for His Holiness the Dalai Lama and home to the most magnificent stone architecture on the planet. It is just a few klicks north of there, I know, that the Pax has just been granted an enclave at Rhan Tso, in the evening shadow of Shivling—the “Phallus of Shiva.” I smile beneath my therm mask as I imagine the Christian missionaries brooding about this heathen indignity.

Beyond Potala, hundreds of klicks to the west, is the ridge realm of Koko Nor with its countless hanging villages and dangerous bridges. Far south along the great ridge spine called the Lob-sang Gyatso lies the land of the Yellow Hat Sect, ending at the terminal peak of Nanda Devi, where the Hindu goddess of bliss is said to dwell. Southwest of them, so far around the curve of the world that the sunset still burns there, is Muztagh Alta with its tens of thousands of Islamic dwellers guarding the tombs of Ali and the other saints of Islam. North of Muztagh Alta, the ridges run into territory I have not seen—not even from orbit during my approach—harboring the high homes of the Wandering Jews along the approaches to Mt. Zion and Mt. Moriah, where the twin cities of Abraham and Isaak boast the finest libraries on T’ien Shan. North and west of them rise Mt. Sumeru—the center of the universe—and Harney Peak, also the center of the universe, oddly enough—both some six hundred klicks southeast of the four San Francisco Peaks where the Hopi-Eskimo culture there ekes out a living on the cold ridges and fern clefts, also certain that their peaks bound the center of the universe. As I turn and look due north, I can see the greatest mountain in our hemisphere and the northern boundary of our world since the ridge disappears beneath phosgene clouds a few klicks north of there—Chomo Lori, “Queen of Snow.”