John Corrill, later a convert, visited Kirtland where he said he heard Mormons "speak in tongues unknown to me," and was informed by some non-Mormons who were present "that the tongues were regular Indian dialects, which I was also informed, on inquiry, the persons who spoke had never learned."
[John Corrill, A Brief History of the Church of Christ of Latter Day Saints, (Commonly Called Mormons) . . . (St. Louis: John Corrill, 1839), 9; Dan Vogel and Scott C. Dunn, '"The Tongue of Angels": Glossolalia among Mormonism's Founders,' Journal of Mormon History Vol. 19, No. 2, 1993]