d'Aubigné, 1847, p. 97. d'Aubigné, Jean Henri Merle (1847), The Protector: a vindication (2nd, revised ed.), Oliver & Boyd, p. 97
Bennett, 2010, p. 113. Bennett, Martyn (2010), The A to Z of the British and Irish Civil Wars 1637-1660, The A to Z Guide Series, vol. 197, Rowman & Littlefield, p. 113, ISBN9780810876262