The six cases here are among the last that Sherlock Holmes undertook before he retired to the Sussex downs to keep bees. The problems facing the sleuth are as diverse and challenging as ever however. From seeking the whereabouts of the stolen Mazarin Diamond to discovering the importance of being called Garrideb, by way of a mysterious murder on Thor Bridge, a search for eternal youth, and the threat of a Vampire in Sussex, there is no sign of Holmes's deductive powers slowing down.