Tomas had joined Kestrel for the same reason Turk had signed on: it was a one-way ticket to the promised land. Or what they both liked to imagine was a promised land. Tomas wasn't naive: he had crossed the Arch five times before, had spent months in Port Magellan, knew the towns vices firsthand, and had seen how cruelly the town could treat newcomers. But it was a freer, more open, more casually polyglot city than any on Earth—a seaman's town, much of it built by expatriate sailors, and it was where he wanted to spend the last years of his life, looking at a landscape on which human hands had only recently been laid. (Turk had signed on for much the same reason, though it would be his first trip cross-Arch. He had wanted to get as far from Texas as it was practical to get, for reasons he didn't care to dwell on.)

The trouble with Kestrel was that, because it had no future, it had been poorly maintained and was barely seaworthy. Everyone aboard was aware of that fact, from the Filipino captain down to the illiterate Syrian teenager who stewarded the crew mess. It made for a dangerous transit. Bad weather had scuttled many a vessel bound for Breaker Beach, and more than one rusty keel had gone to rest under the Arch of the Hypotheticals.

But the weather in the Indian Ocean had been reassuringly benign, and because this was Turk's first passage he had risked the derision of his shipmates by arranging to be on deck when the crossing happened.

A night crossing of the Arch. He staked out a place aft of the forecastle out of the breeze, made a pillow from a hank of rag stiff with dried paint, stretched out and gazed at the stars. The stars had been scattered by the four billion years of galactic evolution that had transpired while the Earth was enclosed in its Spin membrane, and they remained nameless after thirty years, but they were the only stars Turk had ever known. He had been barely five years old when the Spin ended. His generation had grown up in the post-Spin world, accustomed to the idea that a person could ride an ocean vessel from one planet to another. Unlike some, however, Turk had never been able to make that fact seem prosaic. It was still a wonder to him.

The Arch of the Hypotheticals was a structure vastly larger than anything human engineering could have produced. By the scale of stars and planets, the scale on which the Hypotheticals were assumed to operate, it was a relatively small thing… but it was the biggest made thing Turk imagined he would ever encounter. He had seen it often enough in photographs, on video, in representative diagrams in schoolbooks, but none of those did justice to the real item.