A "Map of the United States Lead Mines on the Upper Mississippi River" was published at Galena, Ill.

The evidence

• “It was not until that portion of Michigan Territory lying west of Lake Michigan, and north of the State of Illinois, had hecome noted because of its lead mines, that the valley of Rock River, below Lake Koshkonong, and above Turtle Creek, began to appear upon published maps with any degree of distinctness. In a " Map of the United States Lead Mines on the Upper Mississippi River," published at Galena, Ill., in 1829, the name " Cos-ca-ho-e-nah," is given to the Yahara (Catfish) River, while opposite its mouth appears this information : " Copper ore (sulphuret) has been found in its original deposit, in such quantities, and over such an extent of this country, as to justify the expectation of that metal being produced in considerable quantities." It is almost needless to say that this "expectation" has not been "justified." At that date, the Indian village at the mouth of Turtle Creek, where now is the city of Beloit, was occupied by Winnebagoes. From this village a road led oflF in a northwesterly direction to -another Winnebago town on Sugar River ; thence, in nearly the same direction to " McNutt's Diggings." North, and at no great distance, the Winnebago Chief.”

  1879-history-of-rock-county/10-rock-county-ch04-early-maps-courts-railroads.md, PDF p. 355 / book p. 359

  Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.

  Grade A: Found on a page of one of our sources