During the flight, Jonathan and Stephen sat at the same table he and Jennifer had eaten dinner just a few days before. Jonathan worked on catching Stephen up on the details as he knew them. With Stephen’s history as an art dealer, Jonathan figured he would be a tremendous help in untangling the mess that Warren Keller and Stanley Friesen discovered.

“Warren Keller is one of our restoration experts on staff. Actually,” Jonathan began sidetracking himself, “As a matter of fact...