Edwin Sullivan Fitch was a resident of Norwich on August 8, 1862 when he enlisted as a Private in Co. C of the 18th Regiment Connecticut Volunteer Infantry; he was promoted to Corporal on March 20, 1864, reduced to ranks May 20, 1864, promoted to Corporal on June 8, 1864 and to 1^st Sergeant on August 20, 1864. He was mustered out on June 27, 1865 at Harper’s Ferry, Virginia.

He was born on December 28, 1839 in Mansfield to Edwin S. and Alice R. (Adams) Fitch. In the 1860 U.S. census in Mansfield, he is a 20 year old clerk in the household of Edwin S. Fitch (Sr.). His father was a master builder-architect who built numerous houses, churches, mills and other buildings in the area.  Several are noted examples of the Greek Revival style.

Edwin S. Fitch married Emma Augusta Smith, born in Norwich between 1870 and 1880. According to his obituary, he married twice but had no children. After the Civil War, he returned to Norwich and was employed as a bookkeeper. His wife, Emma (Smith) Fitch, died in 1892 and he retired to Mansfield about 1902. Edwin S. Fitch resided with his sister, Josephine (Fitch) Buchanan, wife of Archibald Buchanan for the last 14 years of his life.

On November 9, 1881, he applied for an invalid pension, No. 432,963 that was granted under certificate No. 652,394.

Edwin S. Fitch died on February 5, 1916 in Mansfield and is buried at the New Mansfield Center Cemetery.