The concourse of Indians assembled at this council was very great. About 3000 came to the council ground, clothed in their war dresses, and armed with bows, war-clubs and tomahawks. The Sacs and Foxes were the last to arrive, but were very imposing and warlike in their appearance when they reached the ground. They ascended the Mississippi, to Prairie du Chien, in a fleet of canoes, lashed together. They passed and repassed the town in a connected squadron, standing erect, in their canoes, in full dress, singing their war songs. Upon landing, they drew up in martial order, as if in warlike defiance of their bitter enemies, the Sioux, who were encamped near the shore, and who in turn shot back the fierce look of hostility upon their ancient foe. An eye witness describes this scene as one unique and singularly magnificent. The council was held under a spacious booth of green boughs, and lasted for several days. Keokuk was present on this occasion, as the head chief of the Sacs, and took an active part in the council; his course being marked by that moderation and sound policy, for which he is eminently distinguished. [Illustration: COUNCIL GROUND AT PRAIRIE DU CHIENS] In the early part of the year 1828, the President of the United States, appointed Governor Cass and Colonel Pierre Menard, to treat with certain tribes of Indians for the cession of what is called the "mineral region" lying on the Mississippi, south of the Wisconsin. The commissioners arrived at Green Bay late in the summer of that year, and on the 25th of August, made a temporary agreement with the Indians, by which the whites were allowed to occupy the country where the lead mines were worked; and in the ensuing year a treaty was to be held with the Indians for the purchase of the mineral country: in the mean time, no white was to cross a certain line, described in said agreement, to dig for ore; and finally the Indians were paid twenty thousand dollars in goods, for the trespasses already committed on their lands by the miners. This agreement was ratified by the President and senate of the United States on the 7th January, 1829. Soon after President Jackson came into office in 1829, he appointed General McNeil of the army, to fill the place of Governor Cass in the said commission, which was to meet at St. Louis and under the agreement above described, proceed to the mineral region, to effect by treaty, its purchase. In consequence of some disagreement in opinion between these two commissioners, the President subsequently united with them, Caleb Atwater, Esq. of Ohio. They reached Prairie du Chien about the middle of July, where they met deputies on the part of the Winnebagoes, Chippeways, Ottowas, Pottawatimies, Sioux, Sauks, Foxes and Menominees; and on the first of August, a treaty was concluded for about eight millions of acres, extending from the upper end of Rock island to the mouth of the Wisconsin, from latitude 41 deg. 15' to latitude 43 deg. 15' on the Mississippi.