The lending library card of Charles Edgar “Eddy” du Perron and Elisabeth de Roos is part of the Carlton Lake Collection of Maurice Saillet, Sylvia Beach, and Shakespeare and Company at the Harry Ransom Humanities Research Center, the University of Texas at Austin. For more information, visit: https://norman.hrc.utexas.edu/fasearch/findingAid.cfm?eadid=00116.