Covers an area equivalent to squares X15, 21 and 22 on the corresponding WWI map sheet 27. Negative roll 4B, photo 712+. Camera focal length 8 inches. Annotations on recto: north arrow pointing up. "20. S. of Meteren (compare with 15.) showing our trenches, with outpost line now joined up into a continuous trench. July 29, 1918 (10 days after our attack.)" written in ink on paper label affixed to top edge of photo. Annotations on verso: "20. South of Meteren. July 29, 1918 (10 days after taking Meteren.) Showing our system of trenches, outpost line joined up into continuous trench "Scots Trench" Written in pencil. WWI Aerial Photograph Collection: Box 4, Envelope 20.