An Inventory of the Historical Monuments in City of York, Volume 2, the Defences. Originally published by Her Majesty's Stationery Office, London, 1972.
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'Plate 5: York Castle, Clifford's Tower, Details', in An Inventory of the Historical Monuments in City of York, Volume 2, the Defences, (London, 1972) pp. 5. British History Online https://www.british-history.ac.uk/rchme/york/vol2/plate-5 [accessed 20 April 2024]
York Castle: Clifford's Tower, Details.
Clifford's Tower. Corbels and garderobe shoots. c. 1250.
Clifford's Tower. Corbels of N.E. bartizan.
Tower 23. Arrow slit and gunport. c. 1460.