Photograph of H.J. Muller standing on a snow covered path with mountains behind him. Taken during H.J. Muller's trip to Germany in 1932.

Photograph of a room of about 17 ship passengers (among them is H.J. Muller) with raised glasses and wearing caps during a beer drinking contest on board a ship sailing to Europe.

Photograph taken at Erwin Baur's farm near Berlin of 8 people with handwritten identification of front "Prof. Baur's son, Mrs. Baur, Prof. Nachtsheim, Prof. Goldschmidt, Prof. Baur, Dr. von Stein, Dr. H[...], Prof. Altenberg" and with handwritten…

Handwritten letter of introduction from Elof Carlson to H.J. Muller.

Handwritten letter or the notes for a letter written by H.J. Muller to Harry Clifton Byrd (President of the University of Maryland), 1938.

Typed note from H.J. Muller to Elof Carlson regarding a change in plans for a colleague's (William R. Lee) trip to California, 1963.

Typed letter from H.J. Muller to Elof Carlson, 1963.

Typed letter with handwritten postscript from H.J. Muller to Elof Carlson regarding a paper of Elof's, 1963.

Typed letter with handwritten additions and corrections from H.J. Muller to Elof Carlson regarding a manuscript by Elof, 1962.

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.