The Casebook of Mr. Carrington: Simon / Carrington's Cases

J. Storer Clouston first introduced his quick-witted but understated detective Mr. F. T. Carrington ("Inquiry Agent") in the mystery novel Simon. A well-respected man is murdered, and the shadow of guilt may hamper a romance. Carrington's investigation uncovers the villain. Following this, Clouston compiled a series of shorter mysteries in Carrington's Cases (one of which is a humorous parody of Arthur Conan Doyle's Dr. Watson). The latter tales were included in Queen's Quorum.