Photograph of a De Havilland D.H.4 aircraft in low flight, circa 1910s-1930s. Caption: "De Haviland [sic]."Caption on envelope: "DH-4 in flight / Side."
Photograph of a De Havilland D.H.4 ambulance aircraft (fuselage designation A.S. 68188), circa 1910s-1930s. A compartment on the fuselage is open to show a rescue basket.Caption on envelope: "DH-4 ambulance / 3/4 rear / 43."
Photograph of a De Havilland D.H.4 ambulance aircraft (fuselage designation A.S. 68188), circa 1910s-1930s.Caption on envelope: "DH-4 ambulance / Side / 60."
Photograph of a De Havilland D.H.4 ambulance aircraft (fuselage designation A.S. 68188), circa 1910s-1930s. A compartment on the fuselage is open to show a rescue basket.Caption on envelope: "DH-4 ambulance / 3/4 rear."
Photograph of the Aerial Experiment Association Cygnet II aircraft on an iced-over lake, 1909.Caption on envelope: "Cygnet II / Bell Tetrahedral / 1909."
Photograph of the engine of a wrecked Curtiss JN-4D Jenny aircraft, circa 1910s-1930s.Caption on envelope: "Curtiss JN-4D crash / Close up of engine / 34."