EditorialGeorg B?xenstein & Comp, Wilhelm Knapp, ?douard Hannon, Wald und Sumpf, paper, heliogravure, image size: height: 13.9 cm; width: 19.1 cm, inscription: recto u. r. on the cardboard: in white: Ed. Hannon, Br?ssel, K. Ph. 02, landscape photography, artist...