Beginning in the middle of the main channel of the Missouri River, at a point where the prolongation west of the subdivisional line dividing in two equal parts township sixty-three would intersect the same; thence east with said subdivisional line to a point on the northern line of Holt County, where it is intersected by the subdivisional line dividing range thirty-eight into two equal parts; thence northward on said subdivisional line to the northern line of township sixty-five; thence westward on said township line to the southwest corner of section thirty-four in township sixty-six, north, of range thirty-eight, west; thence northward on the subdivisional line dividing range thirty-eight into two equal parts to the north boundary line of the state; thence west with said boundary line to the middle of the main channel of the Missouri River; thence down the Missouri River, in the middle of the main channel thereof, to the place of beginning.