- FondsSylvester - Papers of James Joseph Sylvester
- SeriesBox 2-7 - Letters
- SubseriesBox 2-3 Folder 2-9 - Letters to JJS
- 45 more...
- Item128 - A.L.s., from Francis W. Newman
- Item129 - A.L.s., from C. E. Norton
- Item136 - A.L.s., from James Mill Peirce
- Item137 - A.L.s., from Francis Cranmer Penrose
- File138-139 - A.Ls.s, in German, from Julius Petersen, Copenhagen
- Item140 - A.L.s., from Campbell W. Pinkney
- Item141 - A.L.s., from Frederick Pollock F. R. S.
- 50 more...