[Footnote 1: For George Catlin, Gustavus Sohon, and George Gibbs, see: John C. Ewers, "Gustavus Sohon's Portraits of Flathead and Pend d'Oreille Indians, 1854," _Smithsonian Miscellaneous Collections_, vol. 110, no. 7, 1948; "George Catlin, Painter of Indians and the West," in _Annual Report of the ... Smithsonian Institution ... 1955_, 1956, pp. 483-528; Marvin C. Ross, _George Catlin, Episodes from Life Among the Indians and Last Rambles_, Norman, Okla., Univ. Oklahoma Press, 1959; Harold McCracken, _George Catlin and the Old Frontier_, New York, Dial Press, 1959; David I. Bushnell, Jr., "Drawings by George Gibbs in the Far Northwest, 1849-1851," _Smithsonian Miscellaneous Collections_, vol. 97, no. 8, 1938. For Alfred Jacob Miller, see: Bernard DeVoto, _Across the Wide Missouri_, Boston, Little, Brown and Co., 1947; Marvin C. Ross, editor, _The West of Alfred Jacob Miller_, Norman, Okla., Univ. Oklahoma Press, 1951. For Frederick Remington and Charles Russell, see: Harold McCracken, _Frederick Remington, Artist of the Old West_, Philadelphia, Lippincott, 1947, and _The Charles M. Russell Book; the Life and Work of the Cowboy Artist_, Garden City, Doubleday, 1957.] [Footnote 2: See: Mark H. Brown and W. R. Felton, _The Frontier Years. L. A. Huffman, Photographer of the Plains_, New York, Henry Holt and Co., 1955; Martin F. Schmitt and Dee Brown, _Fighting Indians of the West_, New York, Charles Scribner's Sons, 1948.] [Footnote 3: An excellent group of these crude on-the-spot drawings and paintings is reproduced in Grace Raymond Hebard and E. A. Brininstool, _The Bozeman Trail_, 2 vols., Cleveland, The Arthur H. Clark Co., 1922.] [Footnote 4: No. 173740 in the U.S. National Museum.] [Footnote 5: The information on Brotherton's career has been culled from: _Register of Graduates and Former Cadets United States Military Academy, 1802-1946_, New York, The West Point Alumni Foundation, Inc., 1946; Francis B. Heitman, _Historical Register and Dictionary of the United States Army_, Washington, Government Printing Office, 1903, vol. 1; George W. Cullum, _Biographical Register of the Officers and Graduates of the U.S. Military Academy_, Boston, 1891-1930, vol. 3.] [Footnote 6: Enlistment papers of Hermann Stieffel dated December 17, 1857, Adjutant General's Records, National Archives, Washington.] [Footnote 7: Theo F. Rodenbough and William L. Haskin, _The Army of the United States_, New York, Maynard, Merrill & Co., 1896, pp. 471-472; Remarks on Muster Roll, Company K, 5th Infantry (hereinafter cited as Muster Roll, Co. K), August 31, 1858, Adjutant General's Records, National Archives, Washington.] [Footnote 8: Muster Roll, Co. K, _op. cit._ (footnote 7), December 31, 1859.] [Footnote 9: In 1861 a private's pay was $13.00 per month with $2.00 withheld until expiration of his enlistment and $.12-1/2 withheld for support of the U.S. Soldiers' Home at Washington. (_U.S. Army Regulations_, 1861.)]