An Inventory of the Historical Monuments in Hertfordshire. Originally published by His Majesty's Stationery Office, London, 1910.
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'Plate 26: Royston, Parish Church of St. John the Baptist and St. Thomas of Canterbury', in An Inventory of the Historical Monuments in Hertfordshire(London, 1910), British History Online https://prod.british-history.ac.uk/rchme/herts/plate-26 [accessed 19 April 2025].
'Plate 26: Royston, Parish Church of St. John the Baptist and St. Thomas of Canterbury', in An Inventory of the Historical Monuments in Hertfordshire(London, 1910), British History Online, accessed April 19, 2025, https://prod.british-history.ac.uk/rchme/herts/plate-26.
"Plate 26: Royston, Parish Church of St. John the Baptist and St. Thomas of Canterbury". An Inventory of the Historical Monuments in Hertfordshire. (London, 1910), British History Online. Web. 19 April 2025. https://prod.british-history.ac.uk/rchme/herts/plate-26.
Royston: Parish Church of St. John the Baptist and St. Thomas of Canterbury.

Interior of Nave Looking South-East, Showing 13th-century Lancet Windows