Plan of Lhasa complied from native information by L.A. Waddell. Lt. Colonel, I.M.S.; published in the Geographical Journal, volume XXIII, March issue of 1904. Mongolian Buddhist lamas, G. Ts. Tsybikoff [Tsybikov] and Ovshe (O. M.) Norzunoff [Norzunov] were familiar with the plan and mentioned it in their notes (available in this digital collection at: http://collections.lib.uwm.edu/u?/tibet,106 ) that accompany a set of 50 photographs of Lhasa taken in 1900-1901.