Titles
- Letter from Boone Powell to Michael E. DeBakey1
- Letter from Bryan Cooper to Henry Swan1
- Letter from C. M. Blair, Union Carbide Corporation to Joshua Lederberg1
- Letter from C. Phillip Miller, Rockefeller Institute for Medical Research to Peyton Rous1
- Letter from Carl Sagan to Philip H. Abelson1
- Letter from Carl-Goran Heden to Joshua Lederberg2
- Letter from Cass Canfield to Joshua Lederberg1
- Letter from Charles Yanofsky to Francis Crick1
- Letter from Christian B. Anfinsen (to the owner of the reel of yellow nylon rope [behind the bar])1
- Letter from Claude Koprowski, World Health Organization to Joshua Lederberg1
- Letter from Daniel S. Martin to Michael E. DeBakey1
- Letter from David A. Rytand to Theodosius Dobzhansky1
- Letter from David Rittenberg to Joshua Lederberg1
- Letter from Donald W. Grace to Joshua Lederberg1
- Letter from E. B. Fred to Edward L. Tatum1
- Letter from E. Clar to Joshua Lederberg1
- Letter from E. J. Eichwald to Michael E. DeBakey1
- Letter from Edward L. Tatum to Joshua Lederberg4
- Letter from Edward L. Tatum to the [Electors to the] Hall of Fame for Great Americans1
- Letter from Elbert G. Smith to Joshua Lederberg3