William Pitt and William Pitt the elder: Copy letters, GBR/0012/MS Add.9493. Cambridge University Library.
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William Pitt and William Pitt the elder: Copy letters, GBR/0012/MS Add.9493. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/8732 Accessed April 25, 2024.
