What did David Graeme deliver to the Electress of Hanover?
David Graeme (British Army officer): David Graeme (2 February 1716 – 19 January 1797) was a British soldier, diplomat and courtier, responsible for carrying George III’s proposal of marriage to Charlotte of Mecklenburg-Strelitz. Charlotte of Mecklenburg-Strelitz:  She was also the Electress of Hanover in the Holy Roman Empire until the promotion of her husband to King of Hanover on 12 October 1814, after which she was also queen consort of Hanover.
George III’s proposal of marriage