I found my photo of the headstones. The 'original' one has the last digit in the year rubbed out. It could be either a 3 or a 5. What can be read says "Isaac Herring Died June 29, 184... In the 77 year of his age" The newer headstone, a double for both Isaac and Unity states: Herring Unity Isaac 1770-1846 1766-1843 Isaac, First Settler Herrin's Prairie 1813 I don't know where the dates for the newer headstone were found or when it was placed.