R.S. Phipps Hornby, son of Sir Geoffrey Phipps Hornby (q.v).), entered the Navy in 1879. He became a lieutenant in 1886. From 1901 to 1903 he commanded the Pylades on the Australian Station and was promoted to captain in 1903. While commanding the Diana in the Mediterranean, 1904 to 1906, he was involved in the Akbar boundary dispute. After commanding the Glory in home waters from 1907 to 1908, he was appointed Captain of the Vernon (the naval torpedo school) where he remained until 1911. He then commanded the Swiftsure, Inflexible and Monarch before being promoted to rear-admiral in 1913. Re was Commander-in-Chief, North America and West Indies Station, 1914 to 1915, when he went in the Glory to reinforce the Allied Fleet at the Dardanelles. He was invalided during this voyage for the rest of the war and was engaged in torpedo work. He was involved between 1917 and 1920 in the work of several Admiralty committees, including the Submarine Committee, the Armament Personnel Committee and the Post-War Reconstruction Committee. He was promoted to admiral in 1922 on the retired list.
The papers were deposited on indefinite loan in 1958 and 1959 by Commander W.M. Phipps Hornby, apart from a few items presented earlier by Admiral Hornby himself. From 1900 to 1913 there are official letterbooks, memoranda and other papers. There are a diary, a rough journal and papers for his second command from 1914 to 1915. Finally, there are papers relating to his work on torpedoes and reports from the various Admiralty committees on which he served,