At the hospitable Tadich Grill, Caydance and her brother were drinking French Champagne, sharing fried calamari with a selection of sauces, and waiting for the arrival of sauteed prawns for her and mesquite-grilled salmon steak for him.

"As you surmise from the card game image on the music box base, it is possible that the medieval book of hours was won by a World War II soldier in a card game," Jack said to his sister.

"Indeed, I know of a case where an American GI won several works of looted historic art in a poker game, although I cannot divulge the details."

arrow At a nearby table, two dark-suited men ostensibly concentrating on a shared seafood platter were in a position to overhear their conversation. Or so it seemed to Caydance.

"I should tell you that Sido thinks she is being followed", she remarked.