Send a message to the person who requested a photo of the grave monument of Margaret Prouse with the following comment:
I'm working on my Dad's genealogy. I'm researching Margaret Downing Prouse, and believe this could very well be her headstone. I do know she died 15 Jan 1840 and was buried 23 Jan 1840 in Buckland Brewer, Devon, England. If this matches the headstone, I'd very much appreciate a digital copy. Her husband was Hugh Prouse. Thank you for your willingness to help. I'd offer to help you but know very little at this point.