As for the exact date and time of his arrival, there was no doubt. The owner of the villa, a dubious Belgian aristocrat called Monsieur Laval, said the tenant appeared at two-thirty in the afternoon on the final Friday of March. The courteous but intense young Israeli who called on Monsieur Laval at his home in Brussels wondered how it was possible to recall the date so clearly. The Belgian produced his lavish leather-bound personal calendar and pointed to the date in question. There, penciled on the line designated for 2:30 P.M., were the words: Meet M. Jean-Luc at Bracciano villa.

“Why did you write Bracciano villa instead of just villa?” asked the Israeli visitor, his pen hovering over his open notebook.

“To differentiate it from our St. Tropez villa, our Portuguese villa, and the chalet we own in the Swiss Alps.”

“I see,” said the Israeli, though the Belgian found that his visitor’s tone lacked the humility adopted by most civil servants when confronted by men of great wealth.

And what else did Monsieur Laval remember of the man who rented his villa? That he was punctual, intelligent, and extremely well-mannered. That he was strikingly good-looking, that his scent was noticeable but not obtrusive, that his clothing was expensive but restrained. That he drove a Mercedes car and had two large suitcases with gold buckles and a famous label. That he paid the entire monthlong lease in advance and in cash, which Monsieur Laval explained was not unusual in that part of Italy. That he was a good listener who didn’t need to be told things twice. That he spoke French with the accent of a Parisian from a well-heeled arrondissement. That he seemed like a man who could handle himself well in a fight and who treated his women well. “He was of noble birth,” Laval concluded, with the certainty of one who knows of what he speaks. “He comes from a good bloodline. Write that in your little book.”

Slowly, additional details would emerge about the man called Jean-Luc, though none conflicted with Monsieur Laval’s flattering portrait. He hired no cleaning woman and demanded the gardener arrive punctually at nine o’clock and leave by ten. He shopped in nearby market squares and attended Mass in the medieval lakeside village of Anguillara. He spent much time touring the Roman ruins of Lazio and seemed particularly intrigued by the ancient necropolis at Cerveteri.