Aerial photograph of trench lines in France, July 18, 1917. Several points of interest are marked and numbered.Inscription: "C.A. La Cheppe F22 508. Est Bois de la Tourterelle. 771.7. 3400M. 11H. 28-7-17."
Oblique aerial photograph of Toul, France, circa 1918. The Toul Cathedral is visible near the top center.Inscription: "4 Photo Sec."Inscription on verso: "#2 Toul. 45 oblique."
Oblique aerial photograph of Toul, France, circa 1918. A balloon hangar is visible near the center of the photo.Inscription: "4 Photo Sec."Inscription on verso: "Toul from the air."
Topographical map (photographic reproduction) of France, circa 1918. Several numbered rectangles are overlaid on the map, corresponding to a series of aerial photographs taken on September 16, 1918.Inscription: "1st Corps. Sqdn. 12. Reconnaissance of…