| RefNo | Title | Date |
| NL/30 | Friends (miscellaneous) letters to Katherine Lyttelton | 1877-1940 |
| NL/30/11 | Friends (miscellaneous) letters to Katherine Lyttelton | 1914-1916 |
| NL/30/15 | Friends (miscellaneous) letters to Katherine Lyttelton | c.1883-1937 |
| NL/30/9 | Friends (miscellaneous) letters to Katherine Lyttelton | 1912-1914 |
| NL/30/12 | Friends (miscellaneous) letters to Katherine Lyttelton | 1917-1926 |