1. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 5 March 1958 Genre: Letters (correspondence)
2. Letter from John Burton Sanderson Haldane to Francis Crick Creator: Haldane, J. B. S. (John Burdon Sanderson), 1892-1964 Date: 6 May 1959 Genre: Letters (correspondence)
3. Letter from Warren Weaver to Francis Crick Creator: Weaver, Warren, 1894-1978 Date: 16 June 1964 Genre: Letters (correspondence)
4. Letter from Warren Weaver to Francis Crick Creator: Weaver, Warren, 1894-1978 Date: 21 May 1965 Genre: Letters (correspondence)
5. Letter from Francis Crick to Harold Frank Robinson, North Carolina State University Institute of Biological Sciences Creator: Crick, Francis, 1916-2004 Date: 21 February 1964 Genre: Letters (correspondence)
6. Letter from Francis Crick to H. Gobind Khorana Creator: Crick, Francis, 1916-2004 Date: 9 January 1967 Genre: Letters (correspondence)