Check South Florida Pioneers, issue # 1, July 1974, pages 1 & 2. Also go to Desoto County, FL Web Page for another Keen and Johnson researcher. Elias E. Johnson's father said to be James Madison Johnson. I have a Johnson surname that I am researching they migrated to Taylor Co., FL from Warren Co., Ga. Don't know if there is any connection to yours. I will e -mail you. Good luck with your search.