Images Found on Find a Grave
Note that his tombstone says Co. I, 12 Iowa.
The 27th Iowa roster says he enlisted on Dec 18, 1863.
He was transferred to Co. I 12th Iowa on July 15, 1865.
Peter Lewis
New Sabylund Cemetery
Pepin, Pepin County, Wisconsin
(Sept. 10, 1843 - Dec. 11, 1910)