Edith, I do not live in Petersburg, but I do have a copy of "Rosehill Cemetery Records" by Jeanne Weaver. I have many relatives buried in this cemetery. Helen P. Poston was buried on free ground on May 4, 1928 so she probably died the day or 2 days before that. She probably does not have a headstone, but you might like to contact Jeannne to see if she can help or knows someone that might. Call the Petersburg Observer at (217)632-2236 and ask for Jeanne Weaver. Hope this helps!!!!