It turns out that a few of printings of the LDS Articles of Faith had 14 articles instead of 13. One of the fourteen-article versions was in a book entitled The Mormons, or Latter-day Saints, in the Valley of the Great Salt Lake (Philadelphia: Lippincott, Grambo, & Co., 1852) written by a government cartographer named John W. Gunnison. Another was printed in an LDS newspaper called the Frontier Guardian edited by Orson Hyde.
Most interesting is the difference in Article 8:
"We believe in the word of God contained in the Bible, we also believe the word of God recorded in the Book of Mormon, and in all other good books."
Of this version Lew Wallace writes, "Using this version, the admonition to 'study the scriptures' takes on new meaning, for careful evaluation is mandatory as we dig out the things which qualify as the 'word' of God (i.e., of divine origin), not only in the Bible and Book of Mormon, but in other good books-- even those without Church imprimatur."
Taken from Lew Wallace's A New View of Our Scriptures in the March 2001 issue of By Commmon Consent.