Historical memoirs of my own time

"Sir Nathaniel William Wraxall, 1st Baronet (8 April 1751 ? 7 November 1831) was an English author....He visited Portugal and was presented to the court, of which he gives a curious account in his Historical Memoirs; and in the north of Europe he made the acquaintance of several Danish nobles who had been exiled for their support of the deposed Queen Caroline Matilda, sister of George III. Wraxall at their suggestion undertook to endeavour to persuade the king to act on her behalf. He was able to secure an interview with her at Zell in September 1774. His exertions are told in his Posthumous Memoirs. As the queen died on 11 May 1775, his schemes came to nothing and he complained that he was out-of-pocket, but George III took no notice of him for some time."--Wikipedia.