Letters to William Pitt Jnr., 1790-10-19 Unit ID: 192 (ff. 9–16). AJCP Reel No: 5992 Date: 1790-10-19
Letters to William Pitt Jnr., 1790-10-29 Unit ID: 168 (ff. 47–49). AJCP Reel No: 5992 Date: 1790-10-29
Letters to William Pitt Jnr., 1791-03-13 Unit ID: 126 (ff. 28-34). AJCP Reel No: 5992 Date: 1791-03-13
Letters to William Pitt Jnr., 1795-01-31 Unit ID: 118 (ff249-251). AJCP Reel No: 5992 Date: 1795-01-31