↑ 1.01.11.21.31.4 Carr-Calthrop, Christopher William, (1933). Notes on the families of Calthorpe & Calthrop in the counties of Norfolk and Lincolnshire... comp. from various sources as herein indicated by Colonel Chistopher William Carr-Calthrop. London: F.A. Perry. Retrieved from the Internet Archive (Here;) Accessed 21 July 2021
↑ 2.02.12.22.3 Hervey, William, Clarencieux King of Arms; Raven John, The Visitations of Norfolk. (1563 & 1613). (Harleian MS 1552). The Harleian Society, (1891). Ed. Walter Rye. The Publications of the Harleian Society, London: The Society. Retrieved from (Here;) Accessed 21 July 2021.
↑ 3.03.13.23.3 (needs sources) via The Peerage. Retrieved from (Here;) Accessed 30 July 2021.
↑ Green, Nina, (2018). Modern spelling transcript of Will of Sir Philip Calthorpe. Norfolk Record Office. Platfoote 197. Retrieved from (Here;) Accessed 31 July 2021.
Douglas Richardson, Plantagenet Ancestry, p. 207.
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