Linton, Edwin, [85].

Ludlow, William, [89].

Maguire, H. N., [20].

67. Map of the North-west, An Early. Arnold Hague. Science, vol. x, p. 217.

68. Map of the Y. N. P. Science, vol. xi, p. 255.

69. Marvels of the Yellowstone. Leisure Hour, vol. xxi, p. 134.

Merriam, C. H., [10].

70. Microscopical Character of Vitreous Rocks of Montana. Frank Rutley and James Eccles. Quarterly Journal Geological Society, London, vol. xxxvii, p. 391.

71. Military Road from Fort Walla Walla to Fort Benton, Report on Construction of. Captain John Mullan, U. S. A. Washington: Government Printing Office. 1863. Pages 19 and 53 refer to geysers and hot springs near the Upper Yellowstone.

72. Mineral Resources of the States and Territories. Rossiter W. Raymond. Washington: Government Printing Office. 1869. Page 142 quotes W. W. De Lacy in regard to hot springs on the Firehole and Snake Rivers.