Send a message to the person who requested a photo of the grave monument of Mary Briggs with the following comment:
I am researching a Miss Cathcart who was the sister of Janet Briggs Cathcart (and thus, the daughter of J. F. Cathcart). Trying to determine her first name, date of birth, etc. She lived at the residence owned by J. F. Cathcart after his death in 1910.