1. Letter from Harold Varmus and Stephen Hughes to Ed Southern, Medical Research Council of Great Britain Creator: Varmus, HaroldHughes, Stephen Date: 11 January 1978 Genre: Letters (correspondence)
2. Letter from Harold Varmus to Mike Fried, Imperial Cancer Research Fund Laboratories Creator: Varmus, Harold Date: [8 February 1978] Genre: Letters (correspondence)
3. Letter from Harold Varmus to Ed Southern, Medical Research Council of Great Britain Creator: Varmus, Harold Date: 4 November 1977 Genre: Letters (correspondence)