Leslie Wagner has some great tips on how to visit cemetery and find genealogical-relevant information there. She advises that "Take a camera to photograph the headstone. Headstone rubbings will actually cause chemical damage to the stone."
You can read Leslie's article in the Dallas History Examiner at http://www.examiner.com/x-2242-Dallas-History-Examiner~y2009m2d23-Helpful-hints-for-visiting-a-cemetery.
