Plain Truth was a bi-weekly magazine published on the press of the Ontario Republican at Canandaigua, New York. Started on March 8, 1822 by Thomas B. Barnum and Lyman A. Spalding, Plain Truth continued until the end of 1828, reflecting odd specimens of Episcopalian religious thought intermixed with Quaker notions, all of which was probably disdained by most Evangelical Christians of that period; (see the Oct. 30 and Nov. 6, 1822 issues of the Palmyra Register for more on Thomas B. Barnum's publishing activities).