This is what improper cleaning can do to a headstone. So before anyone clean a headstone please do a little research first.
Located at Salem Cemetery in Cedarville, AR.
Mary L. Riddle
Aug 9, 1902
Nov 17, 1924
Note: I believe her last name should be Tidwell. She was next to a number of other markers with the last name of Tidwell.
Here is a good article about cleaning from The Association of Gravestone Studies.
"Review and Evaluation of Selected Brand Name Materials for Cleaning Gravestones" by Tracy C. Walther- Architectural Conservator.