Horace Walpole 
Memoirs of the Reign of King George the Second. Volume 1 [PDF ebook] 

Memoirs of the Reign of King George the Second is printed from a Manuscript of the late Horace Walpole, Earl of Orford. Among the papers found at Strawberry Hill, after the death of Lord Orford, was the following Memorandum, wrapped in an envelope, on which was written, "Not to be opened till after my Will." Opening the box, it was found to contain a number of manuscript volumes and other papers, among which were these Memoirs.