- FondsSylvester - Papers of James Joseph Sylvester
- SeriesBox 2-7 - Letters
- SubseriesBox 2-3 Folder 2-9 - Letters to JJS
- 27 more...
- Item71 - A.L.s., from Joseph Henry, Smithsonian Institute
- File72-89 - A.Ls,s., in French, from Charles Hermite, Paris
- Item90 - A.L.s., from Shadworth H. Hodgson
- Item91 - A.L.s., from Richard Claverhouse Jebb
- Item92 - A.L.s., in French, from Camille Jordan, Paris
- Item113 - A.L.s., from Christine Ladd
- 68 more...