Send a message to the person who requested a photo of the grave monument of Catherine Harbottle with the following comment:
Might be the first cousin once removed of my grandfather, though at present I have 1853 as year of his birth (rather than ~1856). Locations are 'plausible' - ie within 25 miles. Whether or not relevant to me, may I thank you on behalf of those that don't bother. I believe appreciation (even if not acknowledged) for all your unpaid hard work far outweighs the aparent ingratitude of some.