South Dakota Codified Laws 7-1-56. Sanborn County boundaries
Beginning at the northwest corner of township one hundred eight north of range fifty–nine, west of the fifth principal meridian, thence west and along the second standard parallel north to the northwest corner of township one hundred eight north of range sixty–two west; thence south and along the range line between ranges sixty–two and sixty–three west, to the southwest corner of township one hundred five north of range sixty–two west; thence east along the first standard parallel north, to the southeast corner of township one hundred five north of range fifty–nine west; thence north and along the range line between ranges fifty–eight and fifty–nine west, to the place of beginning.
Source: SL 1883, ch 31, § 1; SDC 1939, § 12.0157.