William Mycroft is a suggestion that Arthur Conan Doyle derived the name of Mycroft the older brother of Sherlock Holmes from William Mycroft. Conan Doyle was a first-class cricketer who later played for MCC and had a respect for fast bowlers. Mycroft played his last first-class match for MCC in 1886. He umpired four first-class matches before his retirement and later umpired two more during the 1891 season. He died of influenza at the age of 53 in Derby. Mycroft's half-brother, Thomas, played for Derbyshire between 1877 and 1885. William Mycroft William Mycroft (1 February 1841 – 19 June 1894) was an
Special Detective Unit Special Detective Unit The Special Detective Unit (SDU) () is the main domestic security agency of the "Garda Síochána", the national police force of the Republic of Ireland, under the aegis of the Crime & Security Branch (CSB). It is the primary counter-terrorism and counter-espionage investigative unit within the state. The Special Detective Unit superseded the Special Branch (which they are still commonly referred to as), which itself replaced the older Criminal Investigation Department (CID), which was founded in 1921. They work in conjunction with the Defence Forces Directorate of Military Intelligence (G2) – the Republic of Ireland's national intelligence