UZI NAVOT ARRIVED AT Vauxhall Cross shortly before eleven that evening and was fired into the executive suite in a pneumatic tube of an elevator. He wore a gray suit that fit him tightly through his massive shoulders, a white shirt that lay open against his thick neck, and rimless spectacles that pinched the bridge of his pugilist’s nose. At first glance, few assumed Navot to be an Israeli or even a Jew, a trait that had served him well during his career. Once upon a time he had been a katsa, the term used by his service to describe undercover field operatives. Armed with an array of languages and a pile of false passports, Navot had penetrated terror networks and recruited a chain of spies and informants scattered around the world. In London he had been known as Clyde Bridges, the European marketing director for an obscure business software firm. He had run several successful operations on British soil at a time when it was Seymour’s responsibility to prevent such activity. Seymour held no grudge, for such was the nature of relationships between spies: adversaries one day, allies the next.

A frequent visitor to Vauxhall Cross, Navot did not remark on the beauty of Seymour’s grand office. Nor did he engage in the usual round of professional gossip that preceded most encounters between inhabitants of the secret world. Seymour knew the reason for the Israeli’s taciturn mood. Navot’s first term as chief was nearing its end, and his prime minister had asked him to step aside for another man, a legendary officer with whom Seymour had worked on numerous occasions. There was talk that the legend had struck a deal to retain Navot’s services. It was unorthodox, allowing one’s predecessor to remain on the premises, but the legend rarely concerned himself with adherence to orthodoxy. His willingness to take chances was his greatest strength—and sometimes, thought Seymour, his undoing.

Dangling from Navot’s powerful right hand was a stainless-steel attaché case with combination locks. From it he removed a slender file folder, which he placed on the mahogany desk. Inside was a document, one page in length; the Israelis prided themselves on the brevity of their cables. Seymour read the subject line. Then he glanced at the photograph lying next to his inkwell and swore softly. On the opposite side of the imposing desk, Uzi Navot permitted himself a brief smile. It wasn’t often that one succeeded in telling the director-general of MI6 something he didn’t already know.

“Who’s the source of the information?” asked Seymour.

“It’s possible he was an Iranian,” replied Navot vaguely.

“Does MI6 have regular access to his product?”

“No,” answered Navot. “He’s ours exclusively.”