Thanks for the follow up. Are you speaking of Isaac Spears Sanderlinor possibly his grandfather Isaac?
Cyndi Howells of 'Cyndi's List' has several sketches of Sanderlins in her Cyndi's Civil War Ancestors on the net. If you haven't already seen them. There is a picture of Isaac S and Mathilda.If you are sister of Isaac Spears Sanderlin, was your gr gra Grandmother Rebecca Seaton Sanderlin or Hannah?