Augustus Fitzroy, 3rd Duke Of Grafton (1735-1811, Prime Minister of Great Britain 1768-70), signature 'Grafton' on portion of Free Frank front dated 1766, addressed to The Earl of Chatham (William Pitt the Elder, Prime Minister 1766-68); together with engraving of 'Charles Fitz-Roy Duke of Grafton' (the 2nd Duke, Augustus FitzRoy's grandfather)