The author's name is listed as Frederic Lloyd, M.D. in the index for the journal.
Material in the public domain. No restrictions on use.
Lloyd, Frederick. "John Brown Among the Pedee Quakers. Chapter I." The Annals of Iowa 1866 (1866), 665-670.
Available at: http://ir.uiowa.edu/annals-of-iowa/vol1866/iss2/9