1. Administrative County of Kent. 1881. English Census RG12/683, 114 p. 3. original records are held at the National Archives.
2. Cumbria Archive Service. n.d.-a. Marshall Archive Collection. DMar/10/2. Cumbria Office, Cumbria.
3. ———. n.d.-b. Waugh and Musgrave Archive Collection. DWM11/362. Whitehaven Office, Cumbria.
4. King’s College Archive Centre. n.d. (undated note). Note in file containing copies of ACP’s will, King’s College Archive Centre Reference: KCAC/6/1/11/36. Cambridge.
5. Pigou, A.C. circa 1896. Notebook: Undergraduate History Notes. In Pigou 1/2. Marshall Library Archives.