Mo. Rev. Stat. § 46.158: Warren.

Beginning at a point in the middle of the main channel of the Missouri River, where a southern prolongation of the fifth principal meridian would intersect the same; thence north on said meridian line to the northeast corner of township forty-seven, range one, west; thence west on the township line between townships forty-seven and forty-eight to the southeast corner of section thirty-four, township forty-eight, range two, west; thence north with the subdivisional lines to the northeast corner of section fifteen, township forty-eight, range two, west; thence west with the subdivisional lines to the northwest corner of section eighteen, township forty-eight, range two, west; thence north on the range line between ranges two and three, west, to the northeast corner of section twenty-five, township forty-nine, range three, west; thence west with the subdivisional lines to the northwest corner of section twenty-eight, township forty-nine, range three, west; thence south with the subdivisional lines to the southwest corner of section nine, township forty-seven, north, range three, west; thence west with the subdivisional lines to the northwest corner of section eighteen, township forty-seven, range four, west; thence south with the range line between ranges four and five, west, to the middle of the main channel of the Missouri River; thence down said river, in the middle of the main channel thereof as now located to the place of beginning.