Selection of references used:
- 1: Peter Potter, Data Donation
- 2: John Gillingham, The Life and Times of Richard I, 1974, George Weidenfeld and Nicholson Limited (1974)
- 3: The Plantagenet Chronicles, ISBN:1-85501-685-0
- 4: David Charles Douglas, William the Conqueror: the norman impact upon England, University of California Press, 1977
- 5: H.T. Evans, Wales and the War of the Roses, ISBN:ISBN-0-905-778-278
- 6: Rev. H. W. Phillott, Dioresan Histories Hereford, 1888