Sir John Crampton was a British diplomat. He was the eldest son of Sir Philip Crampton, 1st Baronet (1777-1858), Surgeon General to the Forces. After being educated at Eton College and Trinity College, Dublin, he entered the diplomatic service as an unpaid attaché at Turin on 7 September 1826, and was transferred to Saint Petersburg on 30 September 1828. He became a paid attaché at Brussels on 16 November 1834, and at Vienna on 9 May 1839, and was promoted to be secretary of legation at Bern on 13 December 1844. He was then transferred, in the same capacity, on 3 July 1845, to Washington, D.C., where his most important diplomatic services were rendered. He served at first under Sir Richard Pakenham, and then under Sir ...