“It was Major Roper who came up with it.”

“Yes, I know about him. The bomb-disposal hero who ended up in a wheelchair.”

“And made a new career for himself in computers. Anything you want in cyberspace, Roper can find for you, but his great gift is developing new programs in which millions of facts can be overviewed in seconds. Take your evening out with Senator Black. The computer imaged that town house on Park Avenue, the surrounding properties. He then tapped in to every detail about the buildings, what was going on there, the personnel involved, and so on.”

At that moment, Millie came in with a tray and the bacon sandwiches. “They smell good enough to eat, Millie. I might have one myself. Eat up, gentlemen, but carry on, Blake. What’s so special about what Roper’s up to, surely our people can do that?”

“Frankly, not as brilliantly as he can. His programs can show given nationalities, religious backgrounds, family, anything you want, and all at lightning speed. It also indicates anomalies, things that shouldn’t be. It means his computer is thinking for itself and making deductions, but doing it at a speed beyond human comprehension.”

“Conceptual thought by a machine. Quite something,” Cazalet said.

“Anyway, to cut it short, the computer threw up the nationalities of the people working in the area of Black’s town house, which were many. Some of them were English, and Roper, interested, cross-referenced the identities, passports, birthplaces and religions, and in no time at all, one Henry Morgan, who’d been working as a security guard at Gould amp; Co. opposite Black’s house, popped up. He was English, but with a Muslim mother.”

“Really. Is that unusual?”

“Just enough so that what Roper saw next rang bells: Morgan was a highly qualified pharmacist with a master’s degree, who also taught at London University, and he entered our country on a tourist visa.”