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HE author hereby acknowledges obligation to the Lewis and Clark families, especially to William Hancock Clark of Washington, D. C., and John O'Fallon Clark of St. Louis, grandsons of Governor Clark, and to C. Harper Anderson of Ivy Depot, Virginia, the nephew and heir of Meriwether Lewis, for letters, docu ments, and family traditions; to Mrs. Meriwether Lewis Clark of Louisville and Mrs. Jefferson K. Clark of New York, widows of Governor Clark's sons, and to more than twenty nieces and nephews; to Reuben Gold Thwaites of the University of Wisconsin, for access to the valuable Draper Collection of Clark, Boone, and Tecumseh manu scripts, and for use of the original journals of Lewis and Clark which Mr. Thwaites is now editing; to George W. Martin of the Kansas Historical Society at Topeka, for access to the Clark letter-books covering William Clark's correspondence for a period of thirty years; to Colonel Reuben T. Durrett of Louisville, for access to his valuable private library; to Mr. Horace Kephart of the Mercantile Library, and Mr. Pierre Chouteau, St. Louis; to the His torical Societies of Missouri, at St. Louis and Columbia; to Mrs. Laura Howie, for Montana manuscripts at Helena; to Miss Kate C. McBeth, the greatest living authority on Nez Perce tradition; to the descendants of Dr. Saugrain, and to the families and friends of Sergeants Pryor, Gass, Floyd, Ordway, and privates Bratton, Shannon, Drouillard, of the Lewis and Clark Expedition; also to the Librarian of Congress for copies of Government Documents.

E. E. D.

OREGON CITY, OREGON,

September 1, 1902.