From the Library of Congress. The Richmond Palladium and Sun-Telegram, July 13, 1920.
visitors can't see pics , please register or login
The article says the women were members of the
Shawnee Mound Methodist Episcopal church.
The Midwest had literally thousands of pre-Columbian mounds, most of which were leveled for farmland. Many remain, at least partially, the most well known being the Cahokia Mounds Archeological site (once the largest city in North America), and the Serpent Mound in Ohio (a huge effigy mound in the shape of a snake).
None of the mounds were built by the local Indian tribes living on the land when the settlers arrived, such as the Shawnee - they were the products of much more ancient cultures.