Mo. Rev. Stat. § 46.157: Vernon.

Beginning on the western boundary line of the state, at the northwest corner of section thirty of township thirty-eight, range thirty-three, west; thence east with the subdivisional lines to the middle of the main channel of the Marais des Cygnes River; thence down said river, in the middle of the main channel thereof, to the middle of the main channel of the Osage River; thence down the Osage River, in the (middle of the) main channel thereof, to where the range line between ranges twenty-eight and twenty-nine intersects the same; thence south with said range line to the southeast corner of township thirty-five, range twenty-nine; thence with the township line between townships thirty-four and thirty-five to the northwest corner of section one, township thirty-four, range twenty-nine; thence south with the subdivisional lines to the southeast corner of section thirty-five, township thirty-four, range twenty-nine; thence west with the township line between townships thirty-three and thirty-four to the western boundary line of the state; thence north with said boundary line of the state to the place of beginning.