Records of Prime Ministers of the United Kingdom transitions between reigns, eight Prime Ministers each served under two sovereigns: George III had 14 Prime Ministers serving during his 59-year reign (reigned 1760–1820), beginning with the Duke of Newcastle. The last incumbent, Lord Liverpool, was the only one appointed by his son (the Prince Regent) during the father's final incapacity to rule. In downward numerical order, numbers of Prime Ministers in office during other reigns are: Only six Prime Ministers came to serve office under sovereigns in whose own reigns they were born. The present Prime Minister, Theresa May, is the third Prime Minister to have been born in
Royal Archives of George III. Additionally, despite William IV’s official papers being destroyed after his death in 1837, records including personal accounts, military documents, and private correspondence have been preserved in the Royal Archives. As acting Prime Ministers under the reign of William IV and Queen Victoria, Charles Grey, 2 Earl Grey and Lord Melbourne, produced a wealth of official correspondence during their time in service. Known as the Melbourne and Howick Papers, these documents detail noteworthy political and social affairs of the 1830’s. Contributing to the documentation of Queen Victoria’s reign, Viscount Esher edited both private and official correspondence, which was