Butler, of Madison, Wis., for biographical data relating to James Bridger.

To Dr. R. Ellsworth Call, of Cincinnati, Ohio, for valuable assistance pertaining to the entire work.

To the Hon. D. M. Browning, Commissioner of Indian Affairs, for important data relating to the Indian tribes in the vicinity of the Yellowstone Park.

To the officers of the War and Interior Departments, the U. S. Fish Commission, the U. S. Bureau of Ethnology, and of the U. S. Coast and Geodetic Survey, for public documents and other information of great value.

To R. T. Durrett, LL.D., of Louisville, Ky.; Mr. J. G. Morrison, of the Library of Congress, Washington, D. C.; Mr. J. D. Losecamp, of Billings, Mont.; Mr. George Bird Grinnell, of Forest and Stream, New York City; Major James F. Gregory, Corps of Engineers, U. S. A.; Lieutenant Wm. H. Bean, Second Cavalry, U. S. A.; Hon. David E. Folsom, White Sulphur Springs, Mont.; Washington Mathews, Major and Surgeon, U. S. A.; Dr. A. C. Peale, of Philadelphia, Pa.; William Hallett Phillips, of Washington, D. C.; Dr. Lyman B. Sperry, of Bellevue, O.; Mrs. Matilda Cope Stevenson, of Washington, D. C.; Mrs. Sirena J. Washburn, of Greencastle, Ind.; Miss Isabel Jelke, of Cincinnati, O.; Mr. O. B. Wheeler, of St. Louis, Mo.; Mr. O. D. Wheeler, of St. Paul, Minn.; Mr. J. H. Baronett, of Livingston, Mont.; Mr. W. T. Hamilton, of Columbus, Mont.; Mr. Richard Leigh, of Wilford, Idaho; Mr. Edwin L. Berthoud, of Golden, Colo.; and Miss Laura S. Brown, of Columbus, O. H. M. C.

Columbus, Ohio, September 19, 1895.

CONTENTS.

PART I.—HISTORICAL.

PART II.—DESCRIPTIVE.