Gabriel knew too much about terrorism and security to enjoy traveling by airplane, so he rode the Underground to Waterloo Station and caught a late-afternoon Eurostar to Paris. In the Gare de l’Est he boarded a night train for Zurich, and by nine o’clock the next morning he was strolling down the gentle sweep of the Bahnhofstrasse.

How gracefully Zurich conceals her riches, he thought. Much of the world’s gold and silver lay in the bank vaults beneath his feet, but there were no hideous office towers to mark the boundaries of the financial district and no monuments to moneymaking. Just understatement, discretion, and deception. A scorned woman who looks away to hide her shame. Switzerland.

He came upon the Paradeplatz. On one side of the square stood the headquarters of Credit Suisse, on the other the Union Bank of Switzerland. A burst of pigeons shattered the calm. He crossed the street.

Opposite the Savoy Hotel was a taxi stand. He climbed into a waiting car after first glancing at the registration number and committing it to memory. He gave the driver the address of the villa, doing his best to conceal the Berlin accent he had acquired from his mother.

Crossing the river, the driver switched on the radio. An announcer was reading the overnight news. Gabriel struggled to comprehend his Züridütsch. He tuned out the radio and focused on the task ahead. There were some in the art world who thought of restoration as tedious work, but Gabriel viewed each assignment as an adventure waiting to unfold; an opportunity to step through a looking glass into another time and place. A place where success or failure was determined by his own skills and nerve and nothing else.