Augustus Plummer of the 19th Maine Volunteers.
This is my mother and either an uncle or grandfather. His name could be Rudd, Nott or Staplins.
My g-grandmother was named Emma Rudd and this tin type came from her family by way of her grandaughter, Nellie Nott. They were from Montville, Ct.
My grandmother as a teenager, about 1904, in New London, Connecticut.