‘Testimoniae reverentiae erga duos fratres cvm primis pios probos et benignos Carolvm Georgivm Baronem Arden et Honoratissimvm Spencervm Perceval collegit vidva prioris’: Perceval family letter book, GBR/0012/MS Add.10198. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/13555 Accessed September 13, 2026.