Thorpe, Robert, Preface to the fourth edition of a letter to William Wilberforce, Esq. M.P. containing a reply to a letter from Zachary Macauley, Esq. to the Duke of Gloucester., 1815, Volume: 67. Lord Eldon Manuscript Collection, MSS-056. Manuscripts. https://aspace.ll.georgetown.edu/public/repositories/3/archival_objects/30586 Accessed January 17, 2025.