Looking Up the Toroweap from Vulcan's Throne. Tertiary History of the Grand Cañon District. U. S. Geological Survey [Vintage Atlas Print]
Julius Bien & Co, 1882. Print. Grand Cañon District Atlas Sheet V [19 1/2" x 31 1/2"]. There is a vertical fold line at the center, there is a small open tear to the bottom margin, affecting just a minuscule portion of the title, and there are light tide marks..... More