John Quincey Adams - 6th President of the USA. Original issue of The London Gazette dated 23rd March 1816 reporting that John Quincey Adams, Envoy Extraordinary and Minister Plenipotentiary from the USA, had his first private audience with Her Majesty at the Queen's Palace. Note: Queen Charlotte Sophia was the wife of Kind George III, who was suffering from one of his bouts of mental disturbance at this time. Adams had been appointed Ambassador to Britain by President James Madison in 1815, his time was most spent helping stranded American sailors and prisoners of war following the end of the War of 1812-15 between Britain and the USA