[4] In 1765 he was granted by letters patent the office of keeper and constable of the Castle of Gloucester by King George III.
[5][6] By that time the office was largely honorary as the castle had long since been reduced just to a keep which was used as a gaol.
[1] Nicholas Hyett stood as a Tory for the parliamentary constituency of Gloucester unsuccessfully in 1734.
[7] Hyett was probably responsible for the current façade of Hyatt House, a grade II listed building in Westgate Street, Gloucester.
[8][9] Hyett married a widow, Henrietta Maria Holker (née James), by whom he had a son Benjamin,[10] who was appointed a freeman of Gloucester in 1762.