have you found out about the origins of the Shafer picture? I have an idea that since you are a Holmes it could be from my line, Starks/Shafer/Banks/Holmes.
Emma Holmes married Thomas Henry Banks, Their daughter Viola married Fred Amos Shafer their daughter Bina who married Bert Starks is my grandma. The picture could be Fred and Viola or Fred's parents Willard and Lillian. I have pictures of Viola so if its that couple I would know right away.