Since we do cemetery maintaince, I will bet your stone that suddenly appeared exactly where is should have been either was at the shed waiting for adhesive, removed by relative whose conscience returned it,(happens more than one thinks) or uncovered buried in thatch) and reset. Nowadays that is why digitals are so great( we don't run out of film, we can play in the computer to enhance) and something over looked frequently shows up. Case point : photo of long distance cemetery and explanation next to roadway and my insatiable curiosity. I blow up and looked at background markers....ah ha missing family several rows back(empty spaces?when cutting road)? Bud.