Covers an area equivalent to square H31 on the corresponding WWI map sheet 36c. Negative roll 16AD, photo number 189. Annotations on recto: north arrow pointing to the left. Annotations on verso: "Front Line Trenches, East of Loos (France) 1917" written in blue ink. "7, B3" printed in pencil. WWI Aerial Photograph Collection: Box 3, Envelope 7.