| RefNo | Title | Date |
| NL/28/7 | Various friends (miscellaneous) letters to Neville Lyttelton | c.1886-1920 |
| NL/30/15 | Friends (miscellaneous) letters to Katherine Lyttelton | c.1883-1937 |
| NL/30/12 | Friends (miscellaneous) letters to Katherine Lyttelton | 1917-1926 |
| NL/30/13 | Friends (miscellaneous) letters to Katherine Lyttelton | 1926-1940 |