Beginning in the middle of the main channel of the Missouri River, at a point where the prolongation north of the range line between ranges twenty-three and twenty-four would intersect the same; thence south with the said line between ranges twenty-three and twenty-four to the southeast corner of section twenty-four of township forty-eight, range twenty-four, west; thence west with the subdivisional lines to the southwest corner of section nineteen of township forty-eight, range twenty-six, west; thence south with the range line between ranges twenty-six and twenty-seven to the southeast corner of township forty-eight, range twenty-seven; thence west with the township line between townships forty-seven and forty-eight to the southwest corner of section thirty-four of township forty-eight, range twenty-nine; thence north with the subdivisional line to the middle of the main channel of the Missouri River; thence down said river, in the middle of the main channel thereof, to the place of beginning.