The Best Exmormon Forum on the Internet! Spalding–Rigdon theory of Book of Mormon authorship. The Spalding–Rigdon theory of Book of Mormon authorship is the theory that the Book of Mormon was plagiarized in part from an unpublished manuscript written by Solomon Spalding.
This theory first appeared in print in the book Mormonism Unvailed [sic], published in 1834 by E. D. Howe. Book of Abraham. A portion of the papyri considered by some to be source of the Book of Abraham.
The difference between Egyptologists' translation and Joseph Smith's interpretations have caused considerable controversy. The Book of Abraham is an 1835 work produced by Joseph Smith[1] that he said was based on Egyptian papyri purchased from a traveling mummy exhibition.
Mormon. Ex-mormon.