I am a descendant of William B. and Mary Ann Self Ellison, the parents of your William Isaac Ellison. My great-grandfather, Nathaniel Thomas Ellison was his brother. I can't help you on the Wilson graves, but I have lots of info about W I and Maud Miller Ellison line and a contact for you if you are interested in the Ellison Family History. I have also started a new Ellison Family Page on Facebook if you are interested. Please contact me privately.