Portrait de René de Gas de profil tourné vers la droite

Atelier Degas - Succession Degas - René de Gas, Paris  - Paul Brame, Paris - Marianne Feilchenfeldt, Zurich, 1961 - Vendu au Art Museum of Chicago, 1961.

Oberlin, Allen Memorial Art Museum, Youthful Works by Great Artists, 1963, cat. 23 (repr.) - New York, Wildenstein & Cie., Master Drawings from The Art Institute of Chicago, 17 octobre-30 novembre 1963, cat. 100 - Palm Beach, Floride, Society of Four Arts, Drawings from The Art Institute of Chicago, 5-27 janvier 1974, cat. 11 - The Art Institute of Chicago, The Regenstein Collection of European Drawings, 1974, pp. 160-161, cat. 79 (repr.), cat. de Harold Joachim - The Art Institute of Chicago, Degas in The Art Institute of Chicago, 19 juillet-23 septembre 1984, cat. 1, pp. 16-17, repr. p. 6 [Cat. de Richard Brettell et Suzanne Folds McCullagh] - Zurich, Tübingen, 1994-1995, Degas. Portraits,  cat. 13 , epr. p. 176 [Cat. de  Felix Baumann et Marianne Karabelnik].