History / World War I; 1914-1918 / Western Front.Position warfare near Bois de Bourlon; Pas-de-Calais; Picardie; France (part of the German Siegried Line): "German prisoners compelled to carry our wounded during the strenuous struggle for Bourlon Wood".Photo (stereoscopic photograph); undated (autumn 1917 (?) ).No. 142 of a series of photographs; London (Realistic Travels Publishers).