Beginning at the northeast corner of township one hundred north of range sixty–two, west of the fifth principal meridian, thence west and along the base line between townships one hundred and one hundred one north, to the northwest corner of township one hundred, range sixty–six west; thence south and along the range line between ranges sixty–six and sixty–seven to the north boundary of the former Yankton-Sioux Indian Reservation; thence southeasterly and along the said north boundary of said former reservation to its intersection with the range line between ranges sixty–one and sixty–two west; thence north and along said range line to the place of beginning.

Source: SL 1872-3, ch 17, § 3; SDC 1939, § 12.0123.