Miss Snow said she was teaching in the Prophet Joseph's family in Nauvoo, Ill., when he told her of the revelation he had received regarding celestial marriage. He received the revelation in 1837, but he was himself afraid to promulgate it until the angel came and stood beside him with a flaming sword and bad him do the command of God. Not until then did Joseph enter into polygamy, or get any of his disciples to take plural wives. In 1840 he began to seal women to him and a few of his follwers did the same. Miss Snow had been sealed to him some time before it was made known to anybody.