Original photograph: 21 x 16 cm, black & white photo, with "A" written in front in pencil, caption under photo reads " #201 - Concrete lined canal and tunnel portal of Main Klamath Canal, October 22, 1907", from Brown Album, reorganized by Elaine Roggensees, 1987 Digital reproduction of photograph: Concrete lined canal and tunnel portal of Main Klamath Canal, Brown Album, Bureau of Reclamation