When Edward VII visited Ireland in July 1907 the Crown Jewels were missing from Dublin Castle. This began a web of political intrigue, homosexual scandal and tragedy. Investigation by Scotland Yard suggested that the thief was on the staff of Sir Arthur Vicars, custodian of the jewels. This brought intense scrutiny on his staff, including Frank Shackleton, brother of the explorer. Shackleton, later bankrupted and imprisoned, drifted into obscurity. Where are the jewels now, worth millions and belonging to the Irish state?