Send a message to the person who requested a photo of the grave monument of Rose Ann Mardell with the following comment:
Researching Petken family for my Mother. Reading through some old letters to her and there was mention of a cousin called Rose Petken who I think may have married a Mardell. I believe this may be her. Thank you for this service. This makes a huge difference when showing my Mum information from Ancestry on the computer. Real photos of gravestones is so much better to show her.