No further direct information concerning Beltrami, personally, can be added to the preceding; and enough undoubtedly has been said to fill the blank hitherto existing, and to place him properly before the people of Minnesota, to the majority of whom his name is totally unknown. There remains, however, to supplement this monograph, one more task to be performed, at some future time, when the territory he independently explored shall have been surveyed and mapped by the deputies of the General Land Office, and that is the examination and verification of the route traveled by him, and of the lakes and rivers he visited, in order to restore and bring into popular use, so far as practicable, the names he gave to many places; though he named only certain lakes, streams and islands, hitherto undistinguished. The Legislature, last winter, at the instance of the Historical Society, and in conformity with the custom of naming some of the counties of a territory or state after its early explorers, established a county by the name of Beltrami; which extends from the first “range line” below the mouth of Turtle River, on the east, to the line between ranges 38 and 39 on the west, and from the line between townships 154 and 155 on the north to the north line of Beecher county, and to the Mississippi on the south. This county comprehends the region of the head of “Bloody River,” &c., and is in area about 4,000 square miles—subject to reduction and modification of boundary it is true; but, it is to be hoped, always to retain the same name, and to include the “Julian Sources of the Mississippi” within its limits. Of this act of legislation, his friend, Major Taliaferro says, “It is a high compliment;—one well deserved, and creditable to the movers and State;” and all lovers of justice who read Beltrami’s own words will rejoice that his claims have at last been officially recognized. In reference to the opportunity he had of perpetuating his own name in the Indian territory by giving it an archipelago, as he terms it, of the Mississippi—the present “Thousand Islands,” situated a mile or two below St. Cloud—he wrote, “After my death, men will dispose of my name as God will of my soul, according as I shall have well or ill deserved during my life; and I leave to my friends, and to those who have had opportunities of becoming acquainted with my heart, the charge of defending my memory, should it ever be attacked by injustice or prejudice.” APPENDIX. HYDROGRAPHY OF THE SOURCES OF THE MISSISSIPPI RIVER. In reference to the question as to which stream we should look to for the right source of the Mississippi, the following article has been prepared by Col. Charles Whittlesey—a man well known to the reading public, not only by his explorations and contributions to the stock of knowledge concerning the geology and physical geography of the North West, but by his writings on the earthworks and other relics of the aboriginal inhabitants of the same region: