"12 photolithographs (heavily retouched), 3 chromolithographs. The photographs are by T.H. O'Sullivan and William Bell. These views, typical of the toned photolithographs published in Government reports, are striking scenes of the Western landscape, translated to this medium with a great deal of graphic richness. This title is also of prime importance because it lists every photographer for every one of the Government's surveys"--Hanson Collection catalog, p. 100.