References for Sir Robert 1st Earl Shirley * Ferrers

---

Sir B.Burke: Burke's Peerage and Baronetage. London, 1999
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, Essex Volume. London, Edinburgh, 1908
F.M.Powicke, E.B.Fryde: Handbook of British Chronology. London, 1961