Photograph of William E. Boeing's Martin Model TA Hydro seaplane in a tent hangar on Lake Washington, Washington State, circa October 1915.Inscription on verso: "Return to Dr. Drew."
Photograph of William E. Boeing's Martin Model TA Hydro seaplane in flight over Lake Washington, October 21, 1915.Inscription: "Martin Seaplane - Lake Washington 10/21/15."