Born near
Sylvania, Indiana, Hadley attended the common schools of his native city, Bloomingdale (Indiana) Academy, and
Illinois Wesleyan University,
Bloomington, Illinois. He taught school in
Rockville, Indiana from 1884 to 1889. He studied law. He was
admitted to the bar in 1889. He moved to the State of Washington in 1890 and settled in Whatcom (now
Bellingham), where he practiced law until elected to Congress. Hadley was elected as a
Republican to the
Sixty-fourth and to the eight succeeding Congresses (March 4, 1915 – March 3, 1933). He was an unsuccessful candidate for reelection in 1932 to the
Seventy-third Congress. Reengaged in the practice of law in
Washington, D.C., until 1940, when he retired from active life and moved to
Wilton, Connecticut. He died in
Wallingford, Connecticut, November 1, 1948. He was interred in St. Matthew's Cemetery,
Wilton, Connecticut. ==Sources==