21. Letter from James D. Watson to Francis Crick Creator: Watson, James D., 1928- Date: 23 November 1966 Genre: Letters (correspondence)
22. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 10 October 1966 Genre: Letters (correspondence)
23. Letter from Maurice H. F. Wilkins to James D. Watson Creator: Wilkins, Maurice, 1916-2004 Date: 6 October 1966 Genre: Letters (correspondence)
24. Letter from James D. Watson to Francis Crick Creator: Watson, James D., 1928- Date: 19 October 1966 Genre: Letters (correspondence)
25. Letter from Francis Crick to Thomas J. Wilson, Harvard University Press Creator: Crick, Francis, 1916-2004 Date: 21 October 1966 Genre: Letters (correspondence)
26. Letter from Francis Crick to James D. Watson (and notes concerning Watson's book, "The Double Helix") Creator: Crick, Francis, 1916-2004 Date: 31 March 1966 Genre: Letters (correspondence)Notes
27. Letter from James D. Watson to Francis Crick Creator: Watson, James D., 1928- Date: 10 May 1966 Genre: Letters (correspondence)
28. Letter from Francis Crick to Rosalind Franklin (and notes on two papers by Franklin and Raymond Gosling) Creator: Crick, Francis, 1916-2004 Date: 5 June 1953 Genre: Letters (correspondence)Notes
29. Letter from Francis Crick to Maurice Wilkins Creator: Crick, Francis, 1916-2004 Date: 30 October 1962 Genre: Letters (correspondence)
30. Letter from Francis Crick to the Editor of The Sciences Creator: Crick, Francis, 1916-2004 Date: 2 October 1979 Genre: Letters (correspondence)