He was a fashionable society doctor in London, and physician in ordinary to George III of Great Britain.
[1] He attended George III, becoming physician in ordinary in 1760, taking the place in the new reign of Frank Nicholls; and was created a baronet of Marylebone in the County of Middlesex on 9 August 1764.
[5][6][7] In partnership with a Scottish physician, Andrew Turnbull, he obtained land grants in Florida, where they planned a new settlement, New Smyrna, using indentured labour from the Mediterranean and Negro slaves.
In 1768 eight ships set off from Minorca with more than a thousand settlers on board, but on arrival they found conditions deplorable.
[8] Towards the end of his life he moved abroad, passing his practice to Sir John Eliot.