The next great official is the Town Clerk, who is appointed by the Common Council and re-elected annually. John de Batequell, clerk of the city, is referred to in Letter Book A,[276] and this is the first recorded mention of the office afterwards known as the common clerk, and later as town clerk. Next to the recorder the town clerk was the chief officer in the local courts of law called the Hustings and the Mayor's Court. Among the distinguished men who have held the office two names stand out, viz., John Carpenter and William Dunthorn. Carpenter, town clerk in the reigns of Henry V. and Henry VI., was elected in 1417. He was called also secretary of the city, a title not applied to any other town clerk. He is best known as the compiler of the _Liber Albus_, and as founder of the City of London school. Dunthorn's (1462) name is associated with the _Liber Dunthorn_, which contains transcripts from the _Liber Albus_, _Liber Custumarum_, Letter Books, etc. The Chamberlain or Comptroller of the King's Chamber is appointed by the livery. He was originally a King's officer, and the office was probably instituted soon after the Conquest. It is mentioned in documents of the twelfth century. On June 28, 1232, the office of 'King's chamberlain of London' was granted for life to Peter de Rivallis. His duties and privileges as stated in the grant are very extensive and important. 'He shall have for life the custody of the King's houses at Southampton, and the King's prise of wine there,' 'custody of the King's Jewry, of the mint of England,' and 'all other things pertaining to the office of Chamberlain of London.' By another grant of the same year the said Peter, Treasurer of Poitiers for life, was given the custody of the ports and coasts of England, saving the port of Dover.[277] When the office is mentioned in 1275 it was combined with the offices of Mayor and coroner. The functions of coroner were often exercised by the chamberlain and sheriffs, and when the chamberlain was called away from the city by the King he appointed a deputy coroner. The office was sometimes held by the King's butler, to whom appertained the office of coroner. William Trente, a wine merchant of Bergerac, was appointed King's butler on the 25th November 1301 (30 Edw. I.)[278] He became also the King's chamberlain of the city and coroner of London.[279] Andrew Horn, a fishmonger by trade, who kept a shop in Bridge Street, held the office of chamberlain for several years. He was the compiler of _Liber Horn_, which contains charters, statutes, grants, etc. To him also has been attributed the authorship of the law treatise of mediæval times entitled the 'Mirror of Justice.'[280] He died in 1328. Many attempts were made by the citizens to get the coronership into their own hands, and at last Edward IV. sold the right to appoint a coroner of their own, independent of the King's butler, for £7000.[281]