Marion County is bounded by beginning on the line between ranges eleven and twelve east at the southwest corner of section eighteen, township five, north, range twelve, east; thence east along the section lines to Pearl River, thence up said river with its meanderings to where the line between sections thirteen and twenty-four in township five, north, range twenty, west, intersects said river; thence east with section lines to the southeast corner of section seventeen, township five, north, range eighteen, west; thence north with section lines to the northeast corner of section five, township five, north, range eighteen, west; thence east with township lines to the range line between ranges sixteen and seventeen, west; thence south on the range line to where it intersects the thirty-first parallel of latitude; thence west along said thirty-first parallel to the range line between ranges thirteen and fourteen, east; thence north along said range line to the northeast corner of section twelve, township one, north, range thirteen, east; thence west along north section lines of sections twelve, eleven, ten, nine and eight to the northwest corner of section eight, township one, north, range thirteen, east; thence north to the southwest corner of section thirty-two, township two, north, range thirteen, east; thence west along township line one-half mile to the southwest corner of the southeast quarter of section thirty-one, township two, north, range thirteen, east; thence north one and one-half miles to the center of section thirty, township two, north, range thirteen, east; thence west one-half mile to the range line between ranges twelve and thirteen, east; thence north on the said range line one and one-half miles to the southeast corner of section thirteen, township two, north, range twelve, east; thence west along the south boundary lines of sections thirteen, fourteen, fifteen and sixteen to the southwest corner of section sixteen, township two, north, range twelve, east; thence north along section lines to township line between townships two and three, north, range twelve, east, this point being at the southwest corner of section thirty-three, township three, north, range twelve, east; thence west one and one-half miles along the township line to the southwest corner of the southeast quarter of section thirty-one, township three, north, range twelve, east; and thence north along the half section line dividing sections thirty-one, thirty, nineteen and eighteen to the northwest corner of the northeast quarter of section eighteen, township three, north, range twelve, east; thence west one-half mile to the range line between ranges eleven and twelve, east, this point being at the southwest corner of section seven, township three, north, range twelve, east; thence north along the range line between ranges eleven and twelve eleven miles to the point of beginning. The county site is Columbia.