Thanks for the reply and the additional information. I was thinking it was was probably their son David who took the picture too. I was glad to hear that is what you thought also.
I have been wondering if Samuel and Priscilla's son Samuel was married to Eva Ross. I have not been able to prove this but have found on the internet on the Beers Project under John Alexander Ross who was married to Sadie Welton that John Alexander Ross has a sister Eve who was married to a Samuel Wellon. I am wondering if this is a misprint and it really should be Welton. Do you have any information which might support this?