Walter Annis Attenborough was a barrister. He was the second son of Robert Attenborough, a pawnbrokerand jeweller. In 1874 he married Eliza Scarlett Cutler.
Attenborough studied at Trinity College, Cambridge. He became a student of the Middle Temple on 5 September 1871, and was called to the bar on 17 November 1874, specialising on the Midland circuit and Mayor's Court. He was involved in the Paddon v. Howell case in 1885. At this time he was living at 2 Grove End Road, St John's Wood, N.W.: 5 Essex Court, Temple was possibly his place of work. In 1888 he was still at 2 Grove End Road, and in 1895 he was at Weston Underwood, Olney, Buckinghamshire. His address in 1900 was 2 Pump Court, Temple, E.C.
Foster, Joseph, Men at the Bar: a biographical hand-list of the members of the various inns of court, including Her Majesty's judges, London, 1885; The Incorporated Law Society's Calendar and Law Directory for the Year; Temple City of London Directory, 1900; Who was who: a companion to Who's who, London, vol. 3.