Titles
- Letter from William Hayes to Joshua Lederberg26
- Letter from William Hayes to Luca Cavalli-Sforza24
- Letter from Edward L. Tatum to Joshua Lederberg22
- Letter from Joshua Lederberg to Kimball Atwood22
- Letter from Luca Cavalli-Sforza to William Hayes22
- Letter from Werner Braun to Joshua Lederberg22
- Letter from Joseph Lein to Joshua Lederberg21
- Letter from Joshua Lederberg to Arthur Kornberg21
- Letter from Sol Spiegelman to Joshua Lederberg21
- Letter from Joshua Lederberg to M. Demerec20
- Letter from Joshua Lederberg to Thomas C. Nelson20
- Letter from Roger Y. Stanier to Joshua Lederberg20
- Letter from Boris Ephrussi to Joshua Lederberg19
- Letter from Boris Rotman to Joshua Lederberg19
- Letter from Joshua Lederberg to James A. Jenkins19
- Letter from Joshua Lederberg to William Hayes19
- Letter from Aleck Bernstein to Joshua Lederberg18
- Letter from Francis J. Ryan to Joshua Lederberg18
- Letter from Joshua Lederberg to Max Zelle18
- Postcard from Karl Paul Link to Joshua Lederberg18