An excellent signature by George III’s Prime Minister, The Duke of Portland. Taken from the end of a signed document. Mounted with an image of the Prime Minster.

William Henry Cavendish Cavendish-Bentinck, 3rd Duke of Portland (14 April 1738 – 30 October 1809) was a British Whig and then a Tory politician during the late Georgian era. He served as chancellor of the University of Oxford (1792–1809) and as Prime Minister of Great Britain (1783) and then of the United Kingdom(1807–1809). The gap of 23 years between his two terms as prime minister is the longest of any British prime minister. He is also an ancestor of Queen Elizabeth II, and therefore King Charles III through his great-granddaughter Cecilia Bowes-Lyon, Countess of Strathmore and Kinghorne. 

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