20.P25 [Marseille Farm, Houthulst Forest] January 3, 1918
Covers an area equivalent to portions of squares O30, 36 and P25, 31 on the corresponding WWI map sheet 20. Negative roll 9B, photo number 319. Annotations on recto: north arrow pointing up. "Marseille Fm" printed in white with arrow pointing to its location. Double dashed white lines. WWI Aerial Photograph Collection: Box 1, Envelope 103.