Edwin Pope Thayer served during the Spanish–American War. He served as the regiment commander of Indiana's 158th Volunteers. After his service in the war, Thayer was a colonel in the National Guard for twelve years.
After discovering an original copy of the Monroe DoctrineEdwin Thayer became interested in the preservation of old Senate records. He enlisted the help of Harold Hufford in storing the documents. The old Senate documents that the two organized would later become some of the first legislative documents in the National Archives.
Later life
In 1932 the Republican Party lost control of the Senate leading Thayer to lose his job as secretary. He retired from the Senate on March 4, 1933. Thayer later died in his hometown of Greenfield on February 1, 1943.