A fellow researcher ( and distant cousin) by the name of Sandy Kassen, who follows the Russell Family genealogy in central Kentucky sent me an email saying that she found two persons who are buried in the cemetery that we had not previously found in any records. The death certificates for them say "Burial in Old Union". I found the records on Ancestry.com. They do not have a stone and as the burials were in 1926 and 1932 I assume there may not have been a stone.
The persons are John Rufus Pipes and his wife Addie Johnson. They lived their lives near Gravel Switch and had no children. John was a son of Elias Hardin Pipes and Victoria Hourigan. He passed away in 1926 and Addie died in 1932. His obituary did not mention the burial but their death certificates both give Old Union as the burial place. They were among the last of the Pipes family to remain in Boyle and Marion Counties.
Addie's parents were W. C. Johnson and Celia May.
I can email copies of the death certs if anyone wants them.
I will add them to the "additional List" this week.