Send a message to the person who requested a photo of the grave monument of Mary Gleed with the following comment:
I believe this Isaac Gleed may have been my 3X great Grandfather. Being able to read this headstone may bring some clarity. I do have his wife as Maria, though. Happy to share any information I have if I can identify this as my Isaac Gleed. You are doing a wonderful thing here - thank you for all of your work.