The west line of the county passes between the two Blue Mounds, the largest, or principal one, falling within the county of Dane. About three townships, occupjang the southwest corner of the county, are within the county known as the " Mineral region," and lead mines have long been worked at the Blue Mound, It touches upon Lake Koshkonong, an expansion of Rock river on the southeast, and upon the Wisconsin river at the northwest, embracing the ground upon which the " battle of the Wisconsin" was fought, between the volunteers under General Henry Dodge, and the Indians under Black Hawk, July 21, 1832. There are three newspapers published in this county, at Madison : and six post-offices have been established—at Madison, Mouridville, Cottage Grove, Fitchburg, Dane, and Sun Prairie.