George III (1738-1820), King of Great Britain and Ireland from 1760 to 1820, and Lord of Mann after the Revestment.

The Revesting Act of 1765 is cited throughout the Manx record by his regnal year, as the Act of 5 George III, the same session that produced the Stamp Act. The grants that followed ran in his name. The patent appointing John Quayle Clerk of the Rolls opens with the style of George the Third, by the Grace of God of Great Britain, France and Ireland King, Defender of the Faith, and recites the King's confidence in the fidelity and prudent circumspection of his trusty and well-beloved subject.

The financial settlement made in his reign outlasted him. The land revenues and other possessions acquired in the Island were placed under the management of the department of Woods and Forests and treated as part of the hereditary revenues of the Crown, which George IV and his successors, following his example, placed at the disposal of the House of Commons for their lives, the House then making other provision for the Crown.

His English reign, as this corpus records it, is a long argument about the limits of the prerogative. Whether the King might land foreign troops in the country without the consent of Parliament was debated to a division. He tried to obtain Russian troops in 1775, as the younger Pitt did in 1793. In the crisis over Fox and North he drafted two messages of abdication, and was turned from that purpose by advice to give his opponents rope enough, giving way at the beginning of April instead.