He passed over a paper. Amy saw the words de Virga and mappa mundi.

Amy’s heartbeat speeded up. Here it was, the original notes on the auction of the antique map. “I can’t read the rest,” she murmured. “But look – there’s a list of names: ‘Prof. Otto Hummel … Jane Sperling … Marcel Maubert … Reginald Tawnley.’ And there’s a notation next to each name.”

“Doesn’t Ian speak German?” Dan asked. “Maybe we can get a good enough resolution on a photograph to send it to him.”

“Worth a try. And if he can’t translate it, he can find a Cahill who can.” Amy spread the sheet out on the floor and took a photograph with her phone. She e-mailed it to Attleboro.

A loud noise sent them shooting to their feet. Amy looked around wildly, but Dan laughed softly. “It’s just the fax machine,” he said.

“Make it stop,” Amy groaned. “Somebody might come in. We’re overstaying our welcome.”

Dan crept over to the fax machine. “I wonder if it’s somebody bidding on an Old Masterful.” He mimicked a snooty British accent. “ I say, old chap, a million for that drawing of the cow. Make that two million… .”

Amy stared down at the phone, willing it to chime an answer. When she looked up at Dan, he was staring at the fax in his hand.

“I think you’re right about overstaying our welcome,” he said. He walked over and handed her the fax.

INTERPOL MOST WANTED

AMY CAHILL DAN CAHILL

ALERT TO ART DEALERS, MUSEUMS, AUCTION HOUSES

BE ON LOOKOUT FOR TWO SUSPECTS. CONFIRMED THEFT OF CARAVAGGIO MEDUSA FROM UFFIZI. CONSIDERED TO BE PLANNING ADDITIONAL HEISTS IN EUROPE. BELIEVED TO HAVE CROSSED THE ITALIAN/SWISS BORDER. IF SPOTTED, CONTACT INTERPOL NUMBER BELOW.

“It’s from some guy named Milos Vanek,” Dan said. “He’s the detective assigned to our case, I guess.”

“Photos and descriptions,” Amy said, looking at the next sheet. “This is not good.” She stared at the photos on the paper. They were their real passport photos, so they had been taken a few years before. On the fax they were smudged and indistinct. One piece of luck, anyway. “This can’t be the only fax machine in this place. We’d better get out of here.”