A Primary Source for Joseph Smith’s 1831 Plural Marriage Revelation?

John Dehlin Mormon, Mormon Stories

I’m looking for hard evidence of Joseph Smith’s 1831 plural marriage revelation. There are lots of anti-Mormon sites that mention it, but I’m looking for non-anti-Mormon primary sources. Some leads might be:

  • Can anyone confirm this quote from Widstoe’s book? “The evidence seems clear that the revelation on plural marriage was received by the Prophet as early as 1831” (John A. Widstoe, Joseph Smith-Seeker After Truth, p.236).
  • Can someone confirm this from a primary source? Joseph F. Smith, the sixth president of the church, once stated: “The great and glorious principle of plural marriage was first revealed to Joseph Smith in 1831, but being forbidden to make it public, or to teach it as a doctrine of the Gospel, at that time, he confided the facts to only a very few of his intimate associates. Among them were Oliver Cowdery and Lyman E. Johnson . . .” (As quoted in Historical Record, 1887, vol. 6, p.219).
  • Can anyone confirm this quote: “A recently discovered document is a copy of a purported revelation of 1831 that instructed seven missionaries in Missouri as follows: ‘For it is my will, that in time, ye should take unto you wives of the Lamanites and Nephites that their posterity may become white, delightsome and just, for even now their females are more virtuous than the gentiles.'” The Mormon Experience, page 195

Also, is there a verifiable date as to Joseph’s second marriage–to Fanny Alger?

Please help if you can.