WHEREAS, Under certain lawless and desperate leaders a formidable band, constituting a large portion of the Sac and Fox nation, left their country in April last, and, in violation of treaties, commenced an unprovoked war upon unsuspecting and defenseless citizens of the United States, sparing neither age nor sex; and whereas, the United States, at a great expense of treasure, have subdued the said hostile band, killing or capturing all its principal chiefs and warriors, the said States, partly as indemnity for the expense incurred, and partly to secure the future safety and tranquility of the invaded frontier, demand of the said tribes, to the use of the United States, a cession of a tract of the Sac and Fox country, bordering on said frontier, more than proportional to the numbers of the hostile band who have been so conquered and subdued. Article I. Accordingly, the confederated tribes of Sacs and Foxes hereby cede to the United States forever all the lands to which the said tribes have title or claim (with the exception of the reservation hereinafter made) included within the following bounds, to-wit: Beginning on the Mississippi River, at the point where the Sac and Fox northern boundary line, as established by the second article of the treaty of Prairie du Chien of the fifteenth of July, one thousand eight hundred and thirty, strikes said river; thence, up said boundary line to a point fifty miles from the Mississippi, measured on said line; thence, in a right line, to the nearest point on the Red Cedar of the Ioway, forty miles from the Mississippi River; thence in a right line to a point in the northern boundary line of the State of Missouri, fifty miles, measured on said boundary, from the Mississippi River; thence by the last-mentioned boundary to the Mississippi River, and by the western shore of said river to the place of beginning. And the said confederated tribes of Sacs and Foxes hereby stipulate and agree to remove from the lands herein ceded to the United States, on or before the first day of June next; and in order to prevent any future misunderstanding it is expressly understood that no band or party of the Sac or Fox tribes shall reside, plant, fish or hunt on any portion of the ceded country after the period just mentioned. Article II. Out of the cession made in the preceding article the United States agree to a reservation for the use of the said confederated tribes of a tract of land containing four hundred square miles, to be laid off under the directions of the President of the United States, from the boundary line crossing the Ioway River, in such manner that nearly an equal portion of the reservation may be on both sides of said river, and extending downwards, so as to include Ke-o-kuk’s principal village on its right bank, which village is about twelve miles from the Mississippi River.