Patel picked up the book in his arms—he had had enough of the bag’s bloody handles—satisfied that at least this would be the last time he would have to carry the huge godawful thing anywhere. One of the jewelry students, of all people, had seen the For Sale ad on Patel’s Web page, and had decided that the metallurgical information in the book would make it more than worth the twenty quid that Patel was asking for it. For his own part, Patel was glad enough to let it go. He had bought the book originally for its mathematical and statistical content, and found to his annoyance within about a month of starting his second semester that it was more technical than he needed for the courses he was taking, which by and large did not involve metallurgy or engineering. He had put the book aside, and after that, most of the use it had seen involved Patel’s mother using it to press flowers.

The train pulled up in front of him, stopped and chimed: the doors opened, and people emptied out in a rush of briefcases and schoolbags going by, and here and there a few white uniforms showing from under jackets and coats—people heading to the hospital in town. Patel got on the last car, which would be the first one out, and sat in what would have been the driver’s seat, if there had been a driver: there was none. These trains were handled by a trio of straightforwardly-programmed PCs based somewhere in the Canary Wharf complex. The innovation left the first seats in the front car open, and gave the lucky passenger a beautiful view of the ride into town.

Patel, though, had seen it all a hundred times, and paid little attention until the train swung round the big curve near South Quay and headed across the water. There was something about the quality of the rail sound that changed there, probably to do with the way the water reflected it, and the increased noise level caught his attention. He gazed up briefly at the massive blue-sheened glass-clad tower of One Canada Place, what most people called “the Canary Wharf tower”, with its distinctive pyramidal top and the brilliant white double strobe flashing at the peak of the pyramid, then glanced down again at the building site just across the water from the tower and underneath the train, the new buildings rising on Heron Quays.