I work at Dawson & Wikoff Funeral Home in Decatur, Illinois. I am also researching Overly's in Decatur. I found the death record for Isaac Newton Overly in the old records at the funeral home. The record is dated Jnue 29, 1929. It says that Isaac married Sabra Ann Warfield and that he was a retired farmer. His date of birth was July 5, 1848, he was 80 years, 11 months and 24 days old when he died. His parents were Isaac Overly of Pennsylvania and Eliabeth Wortzbaugh of Germany. He is buried at North Fork Cemetery in Long Creek, Illinois. There is more information on this record. Contact me at TNash74528@aol.com if you would be interested in a copy of this record. I also have a record for Ernest Floyd Overly, who appears to be Isaac Newton Overly's son.