The Crusader's Curse

The last Lord Thorpe, reclusive owner of Thorpe Manor, has died. Sherlock Holmes and Dr. Watson are invited to the auction at which the estate will be sold off, in hopes Holmes can uncover the whereabouts of the missing De Trop Diamond, a jewel-encrusted gemstone brought back from the Crusades by an earlier member of the Thorpe dynasty - and the source of a legendary curse.