Moslem Prostrating Himself on Prayer Rug, c1883. This may be a study for a lost painting or illustration known only as a grisaille (a monochrome) in oil titled "Arabs at Prayer," which shows a group of men, seen from behind, in the interior of a mosque. This lost work is reproduced on page 305 of Gerald A. Ackermans annotated reissued version of the drawings course that Bargue put together with fellow French academic painter, Jean-L?on G?r?me. This became the leading resource for teaching drawing in the second half of the 19th century.