Input (grade 3): A. M. Elgin opened the first coal mine in the Mystic area in 1857, about 1.5 miles north of Mystic on Little Walnut Creek.
Output (grade 2): A. M. Elgin opened the first coal mine in the Mystic area in 1857. It was about 1.5 miles north of Mystic on Little Walnut Creek.