I recently received a letter from 1959 from a woman named Jaclyn Oertle. She's researching her Grether line here are some of the names she lists: John Grether, Michael Grether,Bartholomew Grether aka Bartin or Barton Grethr, George Grether, May Grether, Barbara Grether, Eva Keller Grether, Mary & John Parke, and Melchior Thro. Some of the locations listed are St. Charles, St. Louis, the Gravois Settlement, Mt. Pleasant aka Augusta, and Cottleville. If any of these are familiar to you please let me know.