Jean-Louis Forain, wartime sketch of a soldier writing a letter home, reproduced in the same news article quoted below. Forain's service as a camoufleur is also featured in this short video.
Albert Franz Cochrane, …FORAIN… in the Boston Evening Transcript, August 15, 1931, Part 4, Page 3—
[During World War I, the famous French satririst and illustrator Jean-Louis] Forain not only helped keep up the spirits of his compatriots and their allies and influence the attitude of the neutrals by his terrible caricatures in Le Figaro, L’Opinion and L’Avenir, which, like those of the Hollander [Louis] Raemekers, were reproduced all over the world, but he actually entered the [French] Army, despite his sixty-two years, and rendered yeoman service there in the [Section de Camouflage] as right hand man of the camouflage chief, the painter Guirand de Scevola.
When Forain presented himself booted, strapped and helmeted before [French officer Philippe] Pétain, the future Commander-in-chief, who is blessed with a quiet sense of humor, finding him [Forain], no doubt, a trifle “chesty” for an ex-civilian, [exclaimed] playfully, “Que dirait Forain s’il vous voyait!” (“What would Forain say if he could see you!”)
Below A younger Forain with his wife, Jeanne Bosc in a gondola in Venice.