Doubleday & Page 1903, p.533. Doubleday, H. Arthur; Page, William, eds. (1903). The Victoria history of the county of Essex. Vol.1. Westminster. p.533.
Storer 1815, p.21. Storer, James (1815). The antiquarian itinerary: comprising specimens of architecture, monastic, castellated, and domestic; with other vestiges of antiquity in Great Britain; accompanied with descriptions. Vol.1. W. Clarke. p.21.
Dixon & Marshall 2003, pp.299–306. Dixon, Philip; Marshall, Pamela (2003). "15 The Great Tower at Hedingham Castle: a Reassessment". In Liddiard, Robert (ed.). Anglo-Norman castles (illustrateded.). Boydell Press. pp.297–306. ISBN0-85115-904-4. Originally published in:
Dixon, Philip; Marshall, Pamela (1993). "The great tower at Hedingham castle: a reassessment". Fortress. 18: 16–23.
Disraeli 1993, p.223; McCann 1997, p.295. Disraeli, Benjamin (1993). Gunn, John Alexander Wilson; Wiebe, Melvin George (eds.). Benjamin Disraeli Letters: 1848-1851. Vol.5 (illustrateded.). University of Toronto Press. p.233. ISBN0-8020-2927-2. McCann, John (1997). "The Dovecote at Hedingham Castle". Essex Archaeology and History. 28: 295.
Renn 1960, p.20. Renn, Derek Frank (1960). "The Anglo-Norman Keep, 1066–1138". The Journal of the British Archaeological Association. 3rd Series. 23: 20. doi:10.1080/00681288.1960.11894730.