(40' x 24', IA-81-02) S. of Lytton, Coon Valley Township, Sac County, IA. Dakota Av. S. 4.6 miles from jct with US20 in Lytton, W. on 300th St. 1.35 miles to the crib on the S. side of the road at 3560. (N42 21.216 W94 53.050) Photo by Jack & June Schmidt 7-16-12.