Typed letter with handwritten corrections from H.J. Muller to Elof Carlson regarding Elof's book "The Gene", Muller's additions to "Out of the Night", and Elof's request to write a biography of Muller, 1966.
Typed letter with handwritten additions from H.J. Muller to Elof Carlson regarding a colleague's (William R. Lee) trip to California and about a Irwin Oster, 1963.
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.