Vice Admiral Slade was born in Alderbury, Shropshire in 1859 and joined the Royal Navy in 1872, serving in various capacities and theatres during the remainder of the century. Slade was appointed Director of Naval Intelligence in 1907 and promoted to Rear Admiral the following year. During 1909 - 1912, he served as Commander in Chief East Indies Station, and played an effective role in reducing arms trafficking in the Persian Gulf. His experience in this region led to his appointment by the British Government to secure oil supplies for the Royal Navy, following the Admiralty's decision to change the Fleet's principle source of fuel from coal to oil. Admiral Slade served as Director and subsequently Vice Chairman of the Anglo-Persian Oil Company from May 1914 until his death in 1928.