Career
Vaughan joined the Diplomatic Service in 1894 and served in The Hague, Athens and Cairo before spending three years in South Africa. At Pretoria he was assistant private secretary to Sir Alfred Milner, then political secretary to Lord Roberts, then assistant secretary to the Administration of the Transvaal Republic. He was chargé d"affaires at Santiago, Chile in 1911 and at Bucharest in 1912, and was posted back to Madrid in 1913.
Vaughan was Envoy Extraordinary and Minister Plenipotentiary to Chile 1918-1922, to the Republics of Latvia and Estonia 1922-1927 and concurrently Envoy Extraordinary and Minister Plenipotentiary to Lithuania 1923-1927, and finally to Sweden 1927-1929.
Vaughan died at Stockholm while still in office. After a funeral service at the English Church at Stockholm, his coffin was conveyed to England aboard the Swedish destroyer Ehrensköld.
On arrival in England on 6 May 1929, Vaughan was buried at the Church in the Wood, Hollington, East Sussex. However, he continued to be known as Tudor Vaughan and official notices referred to him as John Charles Tudor Vaughan.