Typed letter with handwitten additions and postscript from H.J. Muller to Elof Carlson regarding who to consult about writing a biography of Muller, 1963.
Typed letter from H.J. Muller to Elof Carlson regarding Elof's appointment to UCLA and about the difficulties of presenting resonable eugenics ideas to the public due to the influence of the Nazis and those who continue to think like them, 1960.
Typed copy of a letter with out signature from Elof Carlson to H.J. Muller regarding Drosophila genetics, a publication of Muller's major works, and the work of Carl Sagan, 1960.
Copy of a typed letter from H.J. Muller to attendees of his 70th Birthday Party or those who expressed their good wishes for his 70th Birthday with original handwritten note to Elof Carlson thanking him for putting together the celebration, 1961.
Typed letter from H.J. Muller to Elof Carlson regarding the birth of Elof's daughter and a manuscript of Elof's with handwritten note from Muller's secretary, Sue Hickham, 1961.