11. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 18 September 1979 Genre: Letters (correspondence)
12. Letter from Aaron Klug to Francis Crick Creator: Klug, Aaron Date: 9 October 1979 Genre: Letters (correspondence)
13. Letter from Charlotte Friend to Francis Crick Creator: Friend, Charlotte Date: 11 September 1979 Genre: Letters (correspondence)
14. Letter from Charlotte Friend to the Editor of The Sciences Creator: Friend, Charlotte Date: December 1979 Publisher: New York Academy of Sciences Genre: Letters (correspondence)
15. Letter from Francis Crick to Andrew Poggenpohl, National Geographic Magazine Creator: Crick, Francis, 1916-2004 Date: 19 August 1974 Genre: Letters (correspondence)
16. Letter from Francis Crick to Charlotte Friend Creator: Crick, Francis, 1916-2004 Date: 18 September 1979 Genre: Letters (correspondence)
17. Letter from Francis Crick to David Harker Creator: Crick, Francis, 1916-2004 Date: 21 January 1953 Genre: Letters (correspondence)
18. Letter from Francis Crick to Harold Himsworth, Medical Research Council of Great Britain Creator: Crick, Francis, 1916-2004 Date: 15 June 1953 Genre: Letters (correspondence)
19. Letter from Francis Crick to Igor Y. Tamm Creator: Crick, Francis, 1916-2004 Date: 5 December 1962 Genre: Letters (correspondence)
20. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 10 March 1966 Genre: Letters (correspondence)Drafts (documents)