20.U6 [Louvois Farm to les 5 Chemins, East of Veldhoek] December 18, 1917
Covers an area equivalent to squares U5, 6, 11, and 12 on the corresponding WWI map sheet 20. Negative roll 9B, photo 183. Annotations on recto: north arrow pointing up. WWI Aerial Photograph Collection: Box 1, Envelope 42.