Item 79676 - A. O Shaw, 20th Maine Regiment, 1864 Item 79676 - A. O Shaw, 20th Maine Regiment, 1864 Contributed by Maine Historical Society Item 79676 Zoom 3087px x 4911px - 10.3"w x 16.4"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society Image Info Abner O. Shaw of Portland served as surgeon of the 20th Infantry Maine Regiment from Nov. 10, 1863 until Feb. 22, 1865. He went to medical school before the war and practiced medicine in Portland after the Civil War. Show Details