Original photograph: 21 x 14 cm, black & white photo, with "NA" written on front in pencil, caption under photo reads "#64 - View showing the neck where Poe Valley and Alkali Valley join the proposed site of inverted siphon. June 11, 1905", from Brown Album, reorganized by Elaine Roggensees, 1987 Digital reproduction of photograph: View showing the neck where Poe Valley and Alkali Valley join the proposed site of inverted siphon, Brown Album, Bureau of Reclamation
