When I visited John & Maria Thompson's gravesite at Shrock Cemetery, I was surprised to find there was a newer stone. How could I find out WHO put it there?

I had the same experience at the Schrock Eureka Cemetery when I found the Snider family stones were new and/or restored. The cemetery really looked nice. Don't know who did it but it was certainly much appreciated because there were no descendants of the lady whose stone was quite impressive. But she had donated the old pipe organ to the Methodist Church when it was built so she certainly deserved a respectable stone. Norma Jennings