Naked Truths About Mormonism Arthur B. Deming. April, 1888. Vol 1. Oakland, CA.
http://www.sidneyrigdon.com/dbroadhu/CA/natruths.htm#040088-1d2
http://www.sidneyrigdon.com/dbroadhu/CA/natruths.htm#040088-1d2
Letter of David Whitmer to Anthony Metcalf, March 1887. Quoted in Richard Lloyd Anderson, Investigating the Book of Mormon Witnesses (Salt Lake City: Deseret Book Company, 1981), p. 86.