The son of Rev. Frederick Anson, Canon of Windsor, and Caroline, eldest daughter of George Venables-Vernon, 5th Baron Vernon, he was educated at Clifton College and Christ Church, Oxford. He was ordained deacon in 1890 and priest in 1891. After a curacy in St Pancras he held incumbencies at Whitton and Hāwera. He was Warden of St John's College, Auckland from 1902 until 1905; Rector of Badsworth, 1906–10; of Birch-in-Rusholme; of Primrose Hill, 1919–22; St Martin in the Fields, 1922–28; and Vicar of Tandridge, 1928–35 (Rural Dean of Godstone, 1930–35).
- "Anson, Harold". Who's Who. ukwhoswho.com. 1920–2016 (February 2018 online ed.). A & C Black, an imprint of Bloomsbury Publishing plc. Retrieved 19 January 2018. (subscription or UK public library membership required)
- "Clifton College Register" Muirhead, J.A.O. p106: Bristol; J.W Arrowsmith for Old Cliftonian Society; April, 1948
- Foster, Joseph (1888–1892). . Alumni Oxonienses: the Members of the University of Oxford, 1715–1886. Oxford: Parker and Co – via Wikisource.
- Crockford's Clerical Directory 1929-30 p25 London: Oxford University Press, 1929
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