APPENDIX. 803 



VII. 



Observations on the Geology and Mineralogy of the Region embracing 

 the Sources of the Mississippi River ^ and the Great Lake Basins, 

 during the Expedition o/'1820. Illustrated with Geological Profiles, 

 and Numerous Diagrams and Vieivs of Scenery. By IIenry R. 

 Schoolcraft, U. S. Geol. and Minera. Exp, 



To the Hon. John C. Calhoun, Secretary of War. 



Washington, April 2, 1822. 

 Sir : I have the honor, herewith, to submit the general report 

 of my observations on the geology and mineralogy of the region 

 visited by the recent expedition to the sources of the Mississippi 

 River. I transmitted to the Department on the 6th of November, 

 1820, a report on the existence of Copper Mines in the Basin of 

 Lake Superior, together with specimens of the native metal, which 

 were politely taken charge of at Albany by General Stephen Van 

 Rensselaer, M. C. Will it be consistent with the views of the 

 Department to print these reports? 

 I have the honor to be, sir, 



Very respectfully, 



Your obedient servant, 



HENRY R. SCHOOLCRAFT. 



REPLY. 



War Department, April 6, 1822. 



Sir : I have received your interesting report on the geology 

 and mineralogy of that section of the western country embraced 

 by the late expedition of Gov. Cass ; and, although I have not had 

 it in my power, as yet, to peruse it -with attention, I will see you, 

 at any time you please, on the subject of your letter respecting it. 



I am, sir. 



Respectfully, 



Your obedient servant, 



J. C. CALHOUN. 

 Mr. Henry R. Schoolcraft. 



