CHAPTER X. ILLINOIS AND THE LAKES. Lead mines--Indian treaty--Ride to Chicago--Vast prairies--The stricken family--Amusing Adventures--Chicago--Milwaukie--Mackinaw--Indian encampment. We spent one day during the present week in passing through the mining country to visit several of the diggings in Wisconsin, and around Galena, and also the smelting furnaces, where the mineral is extracted from the ore and cast into pigs. The country through which we passed was one continued series of rolling prairies. It was perfectly enchanting to see what a perfect flower garden was before us wherever we went. We descended a mine which had been sunk about one hundred feet. The lead runs in veins either due north and south, or west and east. Veins frequently cross each other at right angles. If it is a north and south vein, and a good one--and crosses an east and west vein, it becomes inferior from that point, and the other assumes a superior character, and usually is the best lead. The way the miners dig the lead is to pierce down perpendicularly till they get to the bottom of the sheet--then take the base out and dig upwards. The lead is usually wedged in between two ledges of rocks, filling up the crevice, which runs down from fifty to one hundred feet. It is frequently wedged in so tight that the rocks have to be blasted to loosen it. I went down about fifty feet where they were at work, and then passed along in a horizontal direction, about eighty feet, where the miners were knocking out the lead in the fissures in the rocks over their heads. We loitered around the mines till the decline of day. The shades of evening gathered over us before we had crossed the last prairie on our way to Galena. The moon was just climbing above the horizon, when a prairie wolf darted across our path, as though scared by the sound of our carriage wheels, but having run a few rods, turned around to look to see who were the intruders upon his domain. An Indian treaty is about negotiating at St. Peters, and a steamer started from here a few days since to carry up a party who desire to be present at this gathering of the wild men, and to visit the majestic and stupendous scenery around St. Anthony's Falls. I had fully intended to have been one of the party, but on the eve of starting I felt myself forced for want of time to forego the excursion. _The Steamer James Madison, Wednesday Evening, June 19th._