Léon BONNAT (1833-1922). L.A.S., and annotated photograph; 3 pages in-8, and 27 x 35 cm. Saturday, to a friend, asking for technical advice on how to use Damar's gum. Photograph of the students of the Bonnat workshop posing in the Cour du Mûrier of the École des Beaux-Arts in January 1898 (Pons photograph; 17.2 x 23.4 cm, glued on cardboard 27 x 35 cm), abundantly annotated in the margins by one of them, who wrote down the names or quality of most of the students : "Jacquot de France, logist of the Prix de Rome - the most colourist", "Un algérien Taïb", "Paté un copain à moi très coloriste", "Ménard le copurchic english fashion très bon type", "Desvandelles un des plus forts ou du moins plus habile logiste", etc. Among these young artists, most of whom have remained in the shadows, we note the presence of the young Othon Friesz: " E. Friesz, winner of the Prix de Rome and others.