Camouflaged trenches in Chemin des Dames sector

British Royal Engineers constructing second line trenches in Flanders

Entrance to dugout, Y.M.C.A. station at Badonviller

General De Puydraguen coming out of a trench near Lac Blanc in the Vosges section

Boston water works, Sudbury River Conduit, 1876, Division III, Section 12, sheeted trench heavy sand cutting.

Boston water works, Sudbury River Conduit, 1876, Division III, Section 12, sheeted trench heavy sand cutting.