March 27, 1853, Albion, Michigan.
December 7, 1901, Cincinnati, Ohio, of typhoid fever.
Spring Grove Cemetery, Cincinnati, Ohio.
At age 17, Knapp began studies at a Methodist college in Albion, Michigan. He worked on the family farm in the summer, studying Greek and Latin at night, and attending classes in Albion in the winter.
In 1877, the Methodist Michigan Conference assigned him a circuit. He went on to a career in ministry, founding the magazine God’s Revivalist in 1888; the International Holiness Union and Prayer League in 1897; and God’s Bible School (later known as God’s Bible School and College) in Cincinnati, Ohio, in 1900. His works include: