- 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
- 24 more...
- Item6/2 - Autograph letter signed to James Porter
- Item7/1 - Autograph letter signed to James Porter
- Item7/2 - Autograph letter signed to James Porter
- Item7/3 - Autograph letter signed to James Porter
- Item7/4 - Autograph letter signed to James Porter
- Item7/5 - Autograph letter signed to James Porter
- Item8/1 - Autograph letter signed to James Porter
- Item8/2 - Autograph letter signed to James Porter
- Item8/3 - Autograph letter signed to James Porter
- 24 more...