20.X1 [Bomb Falling West of Roulers] September 21, 1917
Covers an area equivalent to squares Q35 and 36, R31 and 32, W5 and 6, and X1 and 2 on the corresponding WWI map sheet 20. Negative roll 55i, photo 1194. Annotations on recto: north arrow pointing up. Annotations on verso: [#12 HAYTER COLLECTION] "ROULERS, WEST OF ROULERS, NOTE OLD TRAINING TRENCHES AND BOMB FALLING" printed in pencil. WWI Aerial Photograph Collection: Box 2, Envelope 12.