Isherwood pulled on a macintosh. His English scale and devoutly English wardrobe concealed the fact that he was not-at least not technically speaking-English at all. English by nationality and passport, yes, but German by birth, French by upbringing, and Jewish by religion. Few people knew that his last name was merely a phonetic perversion of its original. Fewer still knew that he’d done favors over the years for a certain bullet-headed gentleman from a certain clandestine agency based in Tel Aviv. Rudolf Heller was the name the gentleman used when calling on Isherwood at the gallery. It was a borrowed name, borrowed like the gentleman’s blue suit and gentleman’s manners. His real name was Ari Shamron.

“One makes choices in life, doesn’t one?” Shamron had said at the time of Isherwood’s recruitment. “One doesn’t betray one’s adopted country, one’s college, or one’s regiment, but one looks out for one’s flesh and blood, one’s tribe, lest another Austrian madman, or the Butcher of Baghdad, try to turn us all into soap again, eh, Julian?”

“Hear, hear, Herr Heller.”

“We won’t pay you a pound. Your name will never appear in our files. You’ll do favors for me from time to time. Very specific favors for a very special agent.”

“Super. Marvelous. Where do I sign up? What sort of favors? Nothing shady, I take it?”

“Say I need to send him to Prague. Or Oslo. Or Berlin, God forbid. I’d like you to find legitimate work for him there. A restoration. An authentication. A consultation. Something appropriate for the amount of time he’ll be staying.”

“Not a problem, Herr Heller. By the way, does this agent of yours have a name?”

The agent had many names, thought Isherwood now, watching the man make his way across the quadrangle. His real name was Gabriel Allon, and the nature of his secret work for Shamron was betrayed by subtle things he did now.