11. Letter from Paul Doty to Francis Crick Creator: Doty, Paul M., 1920-2011 Date: 16 March 1967 Genre: Letters (correspondence)
12. Letter from John T. Edsall to Francis Crick Creator: Edsall, John T. Date: 14 March 1967 Genre: Letters (correspondence)
13. Letter from Francis Crick to Lawrence Bragg Creator: Crick, Francis, 1916-2004 Date: 23 February 1967 Genre: Letters (correspondence)
14. Letter from Francis Crick to Maurice Wilkins Creator: Crick, Francis, 1916-2004 Date: 19 January 1967 Genre: Letters (correspondence)
15. Letter from Nathan M. Pusey, Harvard University to Francis Crick Creator: Pusey, Nathan M.Harvard University Date: 9 December 1966 Genre: Letters (correspondence)
16. Letter from Francis Crick to Nathan M. Pusey, Harvard University Creator: Crick, Francis, 1916-2004 Date: 23 December 1966 Genre: Letters (correspondence)
17. Letter from Nathan M. Pusey, Harvard University to Francis Crick Creator: Pusey, Nathan M.Harvard University Date: 13 January 1967 Genre: Letters (correspondence)
18. Letter from James D. Watson to Maurice Wilkins Creator: Watson, James D., 1928- Date: 28 November 1966 Genre: Letters (correspondence)
19. Letter from Francis Crick to Nathan M. Pusey, Harvard University Creator: Crick, Francis, 1916-2004 Date: 1 December 1966 Genre: Letters (correspondence)
20. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 1 November 1966 Genre: Letters (correspondence)