 He was born on 25 July 1736 in the Parish of St. James, Westminster and died without children at Hieres, Provence, July 1781, aged 45.He was the eldest son of Anglo-Grison diplomat Jerome, Count de Salis-Soglio, who had been Naturalized a British Subject in 1731, by his wife Mary, eldest daughter of Charles Fane, 1st Viscount Fane.After some schooling with his younger brothers (Peter, Rev Dr. Henry, and William) in his father's ancestral homeland (the Grisons Republic), he studied at Eton from 1747-1753, where he was one of the 250 pupils there at the time.