The granite pillar tells us it is the final resting place of two children of A. B. and M. J. Cardwell, who were buried there in 1891--apparently before the land was opened for settlement. Cora died May 21, 1891 at the age of 2 years, 5 months. Winnie died May 13, 1891 at the age of 3 months, 13 days. The Sac and Fox Reservation was not opened for settlement until September 22, 1891, so the burial of the two little girls in May forms the basis of a mystery.
It's a great county that has a Powhattan of its own, and probably an Irishman to boot!
This essay has been slightly revised. wp