مراجع
- ^ Washington Post, Oct. 15, 1905.
- ^ Ephriam D. Dickson III, "Shadowy Figures About Whom Little is Known: Artists of the Simpson Expedition, 1858-59," Utah Historical Quarterly, vol. 83 no. 4 (Fall 2015), 270-289.
- ^ Barbara Beeton, "James Hervey Simpson in the Great Basin," Montana the Magazine of Western History (Winter 1978) pp. 28-43. W. Turrentine Jackson, Wagon Roads West: A Study of Federal Road Surveys and Construction in the Trans-Mississippi West, 1846-1869 (New Haven: Yale University Press, 1964), 146-157.
