September 27, 1872, Spring Hill, Pennsylvania.
September 3, 1958, Winona Lake, Indiana.
Oakwood Cemetery, Warsaw, Indiana.
Bentley was the son of Stanley Frank Ackley and Ophelia A. Cogswell, husband of Bertha Myers, and brother of Alfred Ackley.
He showed musical talent early, learning the melodeon, piano, coronet, clarinet and piccolo as a boy.
After moving to New York City in 1888, he began playing the organ in several churches. In 1907, he joined the Billy Sunday-Homer Rodeheaver evangelism team as secretary-pianist, and traveled with them for eight years. As a composer and editor with the Rodeheaver Company, he wrote over 3,000 Gospel tunes. His works include: