Letters to William Pitt Jnr., 1787-12-25 Unit ID: 163 (ff 51-52). AJCP Reel No: 5992 Date: 1787-12-25
Letters to William Pitt Jnr., 1790-01-22 Unit ID: 176. (ff. 88–90). AJCP Reel No: 5992 Date: 1790-01-22