Anderson, W. E. K., ed. The Correspondence of Thomas Percy & Robert Anderson. New Haven: Yale University Press, 1988, 344 p.
A collection of Percy's correspondence with Robert Anderson, a friend during Percy's later years.
Brooks, Cleanth, ed. The Correspondence of Thomas Percy & Richard Farmer. Louisiana: Louisiana State University Press, 1946, 218 p.
A collection of letters between Percy and the scholar and antiquarian Richard Farmer.
Davis, Bertram H. Thomas Percy: A Scholar-Cleric in the Age of Johnson. Philadelphia: University of Pennsylvania Press, 1989, 361 p....
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