1. Kew, The National Archives of the United Kingdom
2. C 81 Chancery: Warrants for the Great Seal, Series I.
3. PRO 31 Transcripts, General.
4. SC 8 Special Collections: Ancient Petitions.
5. Brand, Paul, Seymour Phillips, W. Mark Ormrod, Geoffrey Martin, Chris Given Wilson, Anne Curry and Rosemary Horrox, eds, The Parliament Rolls of Medieval England, 16 vols (Woodbridge: Boydell, 2005).