1. British Library Additional MS 50001, f.22.
2. British Library, Seal cv.7.
3. Cassell, John. John Cassell’s Illustrated History of England, Volume II, from the Reign of Edward the Fourth to the Death of Queen Elizabeth. London, Paris & New York: Cassell Petter & Galpin, 1879.
4. Cherry, John. “Heads, Arms, and Badges: Royal Representation on Seals.” In Good Impressions: Image and Authority in Medieval Seals, edited by Noël Adams, John Cherry, and James Robinson, 12–16. London: The British Museum Press, 2008.
5. The Chronicle of Queen Jane and of Two Years of Queen Mary, edited by John Gough Nichols. London: J. B. Nichols and Son, 1850.