20.O36 [Houthulst Forest, Ypres Salient] December 10, 1917
Description
Covers an area equivalent to portions of squares O36, P31, U6, and V1 on the corresponding WWI map sheet 20. Negative roll 9B, photo 135. Annotations on recto: north arrow pointing to the right with an "x" on the opposite edge of the photo. WWI Aerial Photograph Collection: Box 3, Envelope 44.