René Quinton, 1908 (Agence Rol photograph, BnF)

Press photograph of René Quinton (1866–1925), dated 1908, by Agence Rol (Agence photographique, active 1904–1937). Held by the Bibliothèque nationale de France (Estampes et photographie). Published on Wikimedia Commons with public domain declaration per BnF. The archive record identifies the subject as French biologist René Quinton. Dimensions: 342 × 427 pixels. This is the identification basis for the portrait: the Wikimedia Commons file is titled 'René Quinton 1908.jpg' and the BnF catalog entry names the subject as René Quinton (1866–1925).