Thomas Rymer, Foedera, conventiones, literae, et cujuscumque generis acta publica, inter reges Angliae, et alios quosvis imperatores, reges, pontifices ab anno 1101, (lire en ligne).
(en) Sir James Sibbald David Scott, The British Army: Its Origin, Progress, and Equipment, Cassell, Petter, Galpin & Company, (lire en ligne), p. 86
(en) Derek Birley, Sport and the Making of Britain, Manchester University Press, (ISBN9780719037597, lire en ligne), p. 36