CONSTANTIN GUYS (1802-1892) Drummer, officer and sappers. Pen, brown ink and grey wash on paper. 16.5 x 24.5 cm (at sight). Folds and stains. Provenance: Sale Me Etienne Ader, expert Marcel Lecomte, Hôtel Drouot, room 1, March 18, 1964, lot 55. The catalog states about the set of twenty-six watercolors and drawings by Constantin Guys described at this sale "comes from a single collection. These works once belonged to Charles Baudelaire, and most of them have appeared in various exhibitions of Constantin Guys (Galerie Dru, 1924; Pavillon de Marsan, 1937; Galerie Charpentier, 1943; Bernheim-Jeune 1952; Musée Jacquemard - André, 1957).