20.O17 [German Huts Near Pierkenshoek] December 18, 1917
Covers an area equivalent to squares O17, 18, 23, and 24 on the corresponding WWI map sheet 20. Negative roll 9B, photo 178. Annotations on recto: north arrow pointing to the left. Annotations on the verso: "Reserve German Area on Left Div. Front." WWI Aerial Photograph Collection: Box 1, Envelope 35.