- FondsAdams - Papers of John Couch Adams
- SeriesBox 30-32 - Correspondence and papers of the Adams Memorial Committee
- FileBox 32 - Correspondence, S - Y by sender, relating to the Adams Memorial Committee
- 24 more...
- Item9/1 - Autograph letter signed to James Porter
- Item9/2 - Autograph letter signed to James Porter
- Item9/3 - Autograph letter signed to James Porter
- Item10/1 - Autograph letter signed to James Porter
- Item10/2 - Autograph letter signed to James Porter
- Item10/3 - Autograph letter signed to James Porter
- Item10/4 - Autograph letter signed to James Porter
- Item11/1 - Autograph letter signed to James Porter
- Item11/2 - Autograph letter signed to James Porter
- 23 more...