Photograph of young boy (David Muller?) and young girl feedin goats at a zoo or park. Part of a series of photographs in the same folder.

Photograph of a young boy (David Muller?) feeding goats with a young girl feeding goats in the background at a zoo or park. Part of a series of photographs in the same folder.

Photograph of young boy (David Muller?) feeding goats at a zoo or park. Part of a series of photographs in the same folder.

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.