Beginning on the Ohio river, at the middle of the fourth township of the second range of townships, in the seven ranges, and running with the line between the third and fourth sections of that township north, to the western boundary of the said seven ranges; thence south with the said western boundary, to the middle of the fifth township, in the seventh range of townships; thence east, with the line between the third and fourth sections of the said fifth township, to the Ohio river, and from thence with the Ohio river, to the place of beginning.