| RefNo | Title | Date |
| NL/28/6 | Various friends (miscellaneous) letters to Neville Lyttelton | 1922-1931 |
| NL/30/11 | Friends (miscellaneous) letters to Katherine Lyttelton | 1914-1916 |
| NL/30/9 | Friends (miscellaneous) letters to Katherine Lyttelton | 1912-1914 |
| NL/30/12 | Friends (miscellaneous) letters to Katherine Lyttelton | 1917-1926 |
| NL/30/13 | Friends (miscellaneous) letters to Katherine Lyttelton | 1926-1940 |