Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 / Resumed and Completed, by the Discovery of its Origin in Itasca Lake, in 1832

by Henry Rowe Schoolcraft

I have, &c.,
J. C. CALHOUN.

His Excellency, Lewis Cass, Detroit, M. T.

III.

Department of War, February 25, 1820.

Sir: Mr. Schoolcraft, a gentleman of science and observation, and particularly skilled in mineralogy, has applied to me to be permitted to accompany you on your exploring tour upon Lake Superior. I have directed him to report to you, for that duty, under the belief that he will be highly useful to you, as well as serviceable to the Government and the promotion of science.

You will furnish him with the necessary supplies and accommodation while employed, and every facility necessary to enable him to obtain a knowledge of the mineralogy of the country as far as practicable.

I have, &c.,
J. C. CALHOUN.

His Excellency, Lewis Cass, Detroit.

IV.

Detroit, March 10, 1820.