Sir Nevile Meyrick Henderson, KCMG (10 June 1882 – 30 December 1942) was the Ambassador of Great Britain to Germany from 1937 to 1939. He believed that Adolf Hitler could be controlled and pushed toward peace and cooperation with the Western powers. In February 1939 he cabled the Foreign Office in London: "If we handle him (Hitler) right, my belief is that he will become gradually more pacific. But if we treat him as a pariah or mad dog we shall turn him finally and irrevocably into one." After a long and distinguished career in the Diplomatic Service, which he began as an attaché at St Petersburg in 1905, Sir Nevile Henderson was appointed British Ambassador in Berlin in 1937. The Blue Book which included his last dispatches and his Final Report, were widely read.