20.O27 [Cambrelin Wood and Trench, South of Nachtegaal] December 10, 1917
Description
Covers an area equivalent to portions of squares O27, 32, and 33 on the corresponding WWI map sheet 20. Negative roll 9B, photo 114. Annotations on recto: north arrow pointing to the upper-right with an "x" on the opposite edge of the photo. WWI Aerial Photograph Collection: Box 1, Envelope 13.