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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'Map of the Defences', in An Inventory of the Historical Monuments in City of York, Volume 2, the Defences, (London, 1972) pp. 56. British History Online https://www.british-history.ac.uk/rchme/york/vol2/plate-56a [accessed 23 April 2024]
Map of the Defences
Defences of York