Aerial photograph of Balboa, California, circa 1919. Part of the photographing aircraft is visible in the shot.Inscription on verso: "Balboa, Calif. / 1919 / Ralph Newcomb and Al Wilson / Alt. 4000."
Aerial photograph of Glendale, California, circa 1915-1916. Inscription on envelope: "Glendale from the air 1915. Prof. Rain, Dr. Holgate, Ralph Newcomb, Officers of California Flying School L.A. 1916."
Aerial photograph of a neighborhood in Glendale, California, circa 1915-1916. Inscription on envelope: "Glendale from the air / 1915 / Prof. Rain / Dr. Holgate / Ralph Newcomb / Officers of California Flying School / L.A. / 1916."
Photographic postcard of the Christofferson 1914 Tractor aircraft in low flight over a field, Bishop, California, circa 1914.Inscription: "Dedication of the Exposition Way / Christofferson Tractor Biplane / Bishop, Cal. / 1875 / Forbes."
Photographic postcard of people with the Christofferson 1914 Tractor aircraft, California, circa 1914. The man standing in the cockpit is possibly Silas Christofferson.Inscription: "Forbes / The Return / 1897. Christopherson's [sic] flight over Mt.…
Photographic postcard of a man, possibly Silas Christofferson, working on the propellor of the Christofferson 1914 Tractor aircraft, Bishop, California, circa 1914.Inscription: "Forbes / Christopher Tractor Biplane / Bishop, Cal. 1878."