Photograph of a De Havilland D.H.4 aircraft, circa 1914-1919. A barrel nearby is labeled "Aviation gasoline."Inscription on album page: "D.H.4."Part of Album Three from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of servicemen with a wrecked De Havilland D.H.4 aircraft, circa 1916-1919.Inscription on album page: "2 killed. D.H.4."Part of Album Two from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of servicemen with a line of De Havilland D.H.4 aircraft, circa 1916-1919.Inscription on album page: "First Liberty lineup."Part of Album Two from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of a De Havilland D.H.4 aircraft flying low to the ground, circa 1916-1919.Inscription on album page: "Liberty."Part of Album Three from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of a De Havilland D.H.4 aircraft flying low to the ground, circa 1916-1919. Inscription on album page: "Liberty."Part of Album Three from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of a De Havilland D.H.4 aircraft, circa 1916-1919.Inscription on album page: "D.H.4 (Liberty)."Part of Album Three from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.
Photograph of a serviceman in the cockpit of a De Havilland D.H.4 aircraft (fuselage number 16), circa 1917-1919.Part of a scrapbook related to Edward I. Sproull's military career during and after World War I, circa 1916-1919.