Daughters of the American Revolution Lineage Books, Volume 69, page 73
(Anne Cartwell Evans) states he was a member of the Committee of Correspondence of Lancaster County, Pennsylvania
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Phillip Bedient, Pennsylvania Mennonite Heritage, July 1991, page 26, notes that in 1775 John sold 40 acres that had originally belonged to his father-in-law to George Bressler. He then moved to Lancaster and became a captain in the militia.
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Biographical Annals of Lancaster County, Pa., Beers, 1903, pp. 226-7 - (subject : Henry Leaman Frantz)
John Witmer was a member of General Washington's staff of observation. He died in May, 1793, in Philadelphia, Philadelphia County, Pennsylvani He and his wife, Mary (Harmon), were members of the Lutheran Church.