Edward Irving, a minister in the Church of Scotland, writes of a woman who would "speak at great length, and with superhuman strength, in an unknown tongue, to the great astonishment of all who heard, and to her own great edification and enjoyment in God".[32] Irving further stated that "tongues are a great instrument for personal edification, however mysterious it may seem to us".[33] 19th century – The history of the Church of Jesus Christ of Latter-day Saints (LDS Church), contains extensive references to the practice of speaking in tongues by Brigham Young, Joseph Smith and many others.[34][35] Sidney Rigdon had disagreements with Alexander Campbell regarding speaking in tongues, and later joined the Church of Jesus Christ of Latter-day Saints.