20.U4 [Houthulst Support Trench Between Jean Bart House and Panama House, North of Veldhoek] November 28, 1917
Covers an area equivalent to portions of squares U4 and 5 on the corresponding WWI map sheet 20. Negative roll 9B, photo 14. Annotations on recto: north arrow pointing to the upper-right with a white "x" on the opposite edge of the photo. Annotations on verso: 3 pencilled circles labelled P.B., Jean Bart House, and Panama House. Placement of the circles corresponds to the feature's exact location on recto. WWI Aerial Photograph Collection: Box 1, Envelope 9.