Mary Helen C. Slater, nee Neubauer, 90, of Morton Grove, successfully campaigned to identify virgin prairie land in Morton Grove that became protected as an Illinois State Nature Preserve, beloved wife of John B.; loving mother of Mark H.; dear sister of Susanne (Chester) Gaseor, Daniel (Judith) Neubauer, and the late John Neubauer, Thomas Neubauer, Dorothy Hansen, Margaret Mary Tracy, James Neubauer, and Peter Neubauer. Funeral from Simkins Funeral Home 6251 Dempster St. Morton Grove, IL 60053 Tuesday, July 15th at 9:30 a.m. to St. Martha Church 8523 Georgiana Ave. Morton Grove, IL 60053. Mass at 10:00 a.m. Interment All Saints Cemetery. Visitation Monday, July 14th from 3:00 p.m. to 8:00 p.m. In lieu of flowers, donations to The Alzheimers Association 8430 W. Bryn Mawr, Ste. 800 Chicago, IL 60631 appreciated. Sign online guest book at www.simkinsfh.com . (847) 965-2500