Jocelyn Henry Clive 'Harry' Graham (23 December 1874 – 30 October 1936) was an English writer. He was a successful journalist and later, after distinguished military service, a leading lyricist for operettas and musical comedies, but he is now best remembered as a writer of humorous verse in a style of grotesquerie and black humour.
Graham was the second son of Sir Henry Graham, KCB (1842–1930), Clerk of the Parliaments, and his first wife, Lady Edith Elizabeth Gathorne-Hardy, who died two weeks after Harry's birth. Graham's elder brother Ronald Graham entered the diplomatic service, becoming Ambassador to Italy (1921–33). Graham was educated at Eton and the Royal Military College, Sandhurst.
Graham was commissioned into the Coldstream Guards as a second lieutenant on 6 March 1895, and was promoted to lieutenant on 9 January 1898. From March 1899 to 1901 and again in 1902–1904 he served as aide-de-camp to Lord Minto, Governor-General of Canada. In the intervening year, he served in the Second Boer War in South Africa. He was promoted to captain (supernumerary) on 20 April 1901, and received a regular commission from his regiment in August 1902, as he returned to Canada. Graham kept a journal of his trip across Canada with Minto to the Klondike Gold Rush in the Yukon in 1900, called Across Canada to the Klondyke, which he later presented to Minto, and which was eventually published. Graham retired from the army in 1904, and became private secretary to the former Prime Minister, Lord Rosebery, 1904–06.