Update on Abraham Leonard. I know he owned considerable acreage near what used to be Belvoir, Missouri on the northern edge of the county. I still don't know where he or his wife are buried.
Note: There was a cemetery in Belvoir but it was destroyed. The headstones were pulled out of the ground and found thrown in a ditch about 1979. A few of the stones were rescued. When the rescuer went back, the rest of the stones were gone. The stones that he rescued did not include the name Leonard. Online source for this is Evergreen Memorial Chapel website - location of Vernon Co. Cemeteries. The other source is the Vernon County Cemetery book.