- FondsAdams - Papers of John Couch Adams
- SeriesBox 30-32 - Correspondence and papers of the Adams Memorial Committee
- FileBox 31 - Correspondence, J - S by sender, relating to the Adams Memorial Committee
- 12 more...
- Item3/5 - Autograph letter signed to James Porter
- Item4/1 - Autograph letter signed to James Porter
- Item4/2 - Autograph letter signed to James Porter
- Item4/3 - Autograph letter signed to James Porter
- Item4/4 - Autograph letter signed to James Porter
- Item4/5 - Letter to Charles Taylor
- Item4/6 - Autograph letter signed to James Porter
- Item5/1 - Autograph letter signed to James Porter
- Item5/2 - Autograph postcard signed to James Porter
- 36 more...