57c.E20 [Lion Trench, near Canal du Nord] September 4, 1918
Oblique angle photo. Covers an area equivalent to squares E20, 21, 26 and 27 on the corresponding WWI map sheet 57c. Negative roll 13LB, photo number 3506. Annotations on recto: north arrow pointing down. "LION TR," and "BAPAUME-CAMBRAI RD" labelled in white. Map reference "E20d.75.53" with an arrow pointing to a bridge over the Canal du Nord. WWI Aerial Photograph Collection: Box 4, Album photo 49.