Portrait de René de Gas

Atelier Degas - Succession Degas - René de Gas, Paris - Jean Nepveu-Degas - Wildenstein Gallery, New York, vers 1966 - Henry P. McIlhenny Henry P. McIlhenny - The Henry P. McIlhenny Collection en mémoire de Frances P. McIlhenny, 1986. [Don McIlhenny].

Allentown, Allentown Art Museum, 1 mai-18 septembre 1977, French Masterpieces of the 19th Century from the Henry P. Mc Illhenniy Collection - Atlanta, High Museum, 25 mai-30 septembre 1984, The Henry P. McIllhenny Collection : Nineteenth Century French and English Masterpieces - Atlanta, High Museum, 28 février-27 mai 2001, The Henry Mc Illhenny Collection : Nineteenth French and English Matserpieces - Minneapolis, Institute of Art, 16 juin-9 septembre 2001 - Philadelphie, Philadelphia Museum ,of Art, 16 juiillet-25 septembre 2005, Eighteenth and Nineteenth Century French Drawings from the Collection - Séoul, Art Center, 15 décembre 2009-28 mars 2010; Busan, Busan Museum of Art [Corée], 2 avril-2 juin 2010, Monet to Picasso. Treasures from the Philadelphia Museum of Art.

Joseph Rishel, French Masterpieces of the 19 Century from the Henry P. McIllhenny Collection, pp. 46-47

Atlanta, High Museum, 1984, The Henry P. McIllhennny Collection : Nineteenth Century French and English Masterpieces, n° 17, p. 46 - Atlanta High Museum, 2000, The Henry P. McIllhenny : Nineeenth Century French and English Masterpieces, n° 17, p. 46 - Atlanta High Museum, 2000, Degas and America :The Early Collectors, n° 1, p. 84.