- FondsSylvester - Papers of James Joseph Sylvester
- SeriesBox 2-7 - Letters
- SubseriesBox 2 Folder 1 - Letters from JJS
- File19-26 - Letters to William Spottiswoode
- Item19 - A.L.s., from Baltimore
- Item20 - A.L.s.
- Item21 - A.L.s., from Baltimore
- Item22 - A.L.s., from Baltimore
- Item23 - A.L.s., from Baltimore
- Item24 - A.L.s., from Baltimore
- Item25 - A.L.s., from Baltimore
- 3 more...