In their Present Truth periodical, of 1850, it appears that when the pioneer Adventist’s based their beliefs on the Bible alone, they came up with some “Present Truth” that directly contradicts the present truth about swine’s flesh shown to Mrs. White by her spirit guide. Here are some excerpts on the subject of swine’s flesh and Peter’s vision.
http://www.keepandshare.com/doc/view.php?u=1105199