[1] Born at Hurst Grove, Berkshire, on 25 June 1812, he was second son of Henry Boyle Deane by his wife Elizabeth, daughter of James Wyborn of Hull House, Shelden, Kent.
[1] In 1854 Deane was appointed legal adviser to Admiral Sir Charles Napier commanding the British fleet in the Baltic Sea: he was present on board HMS Duke of Wellington at the bombardment of Bomarsund, and was one of the landing party.
On the abolition of Doctors' Commons in 1858 Deane transferred himself to the courts of probate and divorce, where he obtained a large practice, adapting himself to juries and to the examination of witnesses.
In the ecclesiastical courts of the period there were few leading cases in which Deane was not retained; noted appearances were Boyd v. Phillpotts, in which the legality of the Exeter reredos was challenged, and of Martin v. the Rev.
In this capacity he prepared the British case in the arbitration between Great Britain and Portugal on the border of Mozambique, over the territory south of what is now Maputo Bay; and he advised the government on the Alabama Claims.
Deane was a Conservative in politics, and in the general election 1868 he contested Oxford against Edward Cardwell and William Vernon Harcourt, being heavily defeated.