Clarke was married in 1909 to Madeleine Brooke, daughter of John and Lady Wilhelmina Brooke of Haughton Hall, and had a son and two daughters.
Works
Everyman's Book of Saints. [With plates] (1914)
Church History from Nero to Constantine (1920)
St. Ignatius and St. Polycarp (1930)
Saints and Heroes of the Christian Church. [With portraits] (1931)
The Oxford Movement and after (1932)
Bishop Hobart and the Oxford Movement (1933)
The Case of the Church of England against Rome (1937)
The Via Media. Being a vindication of the faith and order of the Church of England, etc. (1937)
Bishop Chandler. A Memoir. [With a portrait] (1940)
Posthumous
Short History of the Christian Church, etc. (New edition) (1948, 3rd edition 1957)
Roman Claims: A Discussion by an English Churchman (1948)
Notes
^Amongst others he wrote “Everyman’s Book of Saints”, 1914; “Church History: from Nero to Constantine”, 1920; “A Short History of the Christian Church”, 1929; “Saints and Heroes”, 1931; “The Oxford Movement and After”, 1932; “The Via Media”, 1937;and “Life of Bishop Chandler”, 1939 - British Library website accessed 31 April 2011
^"Clifton College Register" Muirhead, J.A.O. ref no 3469: Bristol; J.W Arrowsmith for Old Cliftonian Society; April, 1948
^University Intelligence. Oxford, Oct. 23.The Times, Thursday, Oct 24, 1889; pg. 8; Issue 32838; col A
^Ordinations Winchester The Times, Tuesday, Dec 24, 1895; pg. 14; Issue 34768; col F