Thanks to the D.A.R. this story appears in their 1978 catalog of Cicero Township Cemeteries as told to them by Ralph Bishop: Grandma, Delilah (Chapman) McNeil, Spray's parents were squatters. They arrived in what was then Hamilton County, Indiana in about 1835. Within a year they both contracted a deadly disease and were buried "on the spot", leaving Delilah an orphan.
The "spot" was said to be (in 1975) somewhere along the lane leading to Lawrence and Lucy Pickett's homestead (see map below with red X). William and ? (White) Chapman were buried there. However, according to Grandma Spray's obituary, her mother is buried in Hamilton, Ohio. I believe no confusion was made between Hamilton, Ohio and Hamilton County in Delilah's obituary as some have suggested.
Thank God for D.A.R. but I think William Chapman and his second wife are buried here.