| # | Reference code | Title | Dates | Access restrictions | Retrieval information |
|---|---|---|---|---|---|
| 1 | GB 275 Sylvester/Box 2-7/Box 4-7/Folder 1- 2 | A.Ls.s., from AC to JJS | 12 October 1851–19 November 1887 (Some undated) | None | |
| 2 | GB 275 Sylvester/Box 2-7/Box 4-7/Folder 3-4, 1847-1892 | Letters from JJS to AC | 1847–1978 | None |