Original CDV, on the back is, "Dr. W.S. Todd, presented by Mrs. Cornell". Mrs. Minerva Cornell was the photographer, part of the husband and wife team from Waterloo whose studio imprint is in the back of the photo. She is the woman on the top row, on the right, with the long curls.. I have owned several photos of Mrs. Cornell over the years and I'm 100% sure of her identity. Her husband does not appear to be in this photo.
4" x 2.5", VG antique condition.