Titles
- Letter from George W. Beadle to Joshua Lederberg3
- Letter from Herman M. Kalckar to Joshua and Esther Lederberg3
- Letter from Jerome J. Suran to Adrian Kantrowitz3
- Letter from John E. Pfeiffer to Joshua Lederberg3
- Letter from Leonard M. Elstad to John E. Fogarty3
- Letter from N. Avrion Mitchison to Joshua Lederberg3
- Letter from Peter Medawar to Joshua Lederberg3
- Postcard from Karl Paul Link to Joshua Lederberg3
- Letter from Albert Tyler to Joshua Lederberg2
- Letter from Arthur B. Pardee to Joshua Lederberg2
- Letter from Arthur Kornberg to Joshua Lederberg2
- Letter from Barbara Holcman de Spector to Joshua Lederberg2
- Letter from Charles C. Brinton, Jr. to Joshua Lederberg2
- Letter from David Perkins to Joshua Lederberg2
- Letter from Detlev Wulf Bronk to Joshua Lederberg2
- Letter from E. O. Bennett to Joshua Lederberg2
- Letter from F. M. Burnet to Joshua Lederberg2
- Letter from Frank Fenner to Joshua Lederberg2
- Letter from H. B. Steinbach to Joshua Lederberg2
- Letter from H. Keffer Hartline to Joshua Lederberg2