The Adventure of the Greek Interpreter Sherlock Holmes, far from being a one-off in terms of his powers of observation and deductive reasoning, in fact has an elder brother whose skills, or so Holmes claims, outstrip even his own. As a consequence of this, Watson becomes acquainted with the Diogenes Club and his friend's brother, Mycroft. Mycroft, as Watson learns, does not have the energy of his younger brother and as a consequence is incapable of using his great skills for detective work: In spite of his inertia, the elder Holmes has often delivered the correct answer to a problem that Sherlock has brought to him.
Jack Spratt (fictional detective) Inspector with the Reading, Berkshire "Nursery Crimes Division", with his assistant Sergeant Mary Mary (another nursery rhyme character). Spratt and Mary were originally introduced into the alternate Fforde universe in the Thursday Next novel "The Well of Lost Plots" (2003) before taking over their own "Nursery Crimes" series: Jack Spratt (fictional detective) Jack Spratt is the protagonist in a series of alternate history science fiction fantasy novels by Jasper Fforde. He was named after the character from the English nursery rhyme. As revealed in "The Big Over Easy", for example, he hates eating fat, and was once married to a