 Reinhold and Ruth Benesch photograph at the Science History Institute

The displayed photograph is explicitly captioned Reinhold and Ruth Benesch and credited to the Department of Biochemistry, Columbia University. Verified image link: www.sciencehistory.org/wp-content/uploads/2023/04/benesch_reinhold_and_ruth_columbia_univ-640x500.jpg . The linked historical photograph supplies the identity/attribution evidence; the biography's simplified scientific narrative is not used as a technical source.