William H. Griggs was a resident of Pomfret on August 11, 1862 when he enlisted as a Private in Co. D of the 18th Regiment Connecticut Volunteer Infantry. He was captured June 15, 1863 in Winchester, Virginia, paroled July 15, 1863 and mustered out June 27, 1865.

He was born about October, 1840 in Woodstock, Connecticut to Titus O. and Susan (Harrington) Griggs; he was not living in Mansfield in the 1860 U.S. census. After the Civil War, he worked as a farm laborer, first in Hampton, then in Ashford. He moved to Mansfield after 1880 and was a farmer there. William Griggs married Julia ____ between 1860 and 1870; he married, second Susan M. Hooker. There are no known children from either marriage.

On October 20, 1898, he applied for an invalid pension, No. 953,613 that was granted under certificate No. 1,086,355.

William H. Griggs died on June 13, 1909 in Mansfield and is buried at the Mount Hope Cemetery in Mansfield.