Typed letter with handwritten additions and postscript from H.J. Muller to Elof Carlson regarding Joravsky's writing on Serebrovsky, Lysenkoism, Isreal Agol, and Soloman Levit, 1962.
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.