Two cavalrymen riding watched by two soldiers in landscape

One of a collection of 30 original unsigned ink and wash drawings (by Reinhold) with minute pencil titles, being of staff, cavalry and infantry uniform figures and groups, many with backgrounds of Potsdam (and other?) buildings. Two figures on horseback galloping towards left; two figures standing together in background. One of a collection of 30 original unsigned ink and wash drawings (by Reinhold) with minute pencil titles, being of staff, cavalry and infantry uniform figures and groups, many with backgrounds of Potsdam (and other?) buildings. Two figures on horseback galloping towards left; two figures standing together in background. Unbound; in red cloth and board case, no title; clean. Paris, Ordonneau sale, 1970.