. . . followed by a quotation from William Wordsworth’s Sonnet on Mutability , which was apparently the sort of literary touch you could get away with when you were Freeman Dyson and it was 1962. At a glance—which was all Willem had time for, as the presentation was getting underway—this was a survey of eight hypothetical new weapons systems that military planners in the United States had been worried about during the Kennedy administration. Some of them (supersonic low-altitude missiles, small portable ballistic missiles) still looked quite relevant. Which presumably explained why this chap from MI6 had gone to the trouble of reproducing the document and handing out copies. He’d flown over from London this morning and would fly back in a few hours. He was addressing a group of half a dozen Dutch colleagues in a SCIF—a Sensitive Compartmented Information Facility—near Eindhoven Airport. Inevitably, this particular SCIF was a portable unit built into a shipping container. This meant it was only eight feet wide, which made it a cramped environment for the invited guests. Most of them were military or intelligence. Willem wasn’t, but he’d been invited anyway, for reasons that had not yet been made evident to him.