 According to Granger's daughter, Granger had a vision in which the angel Moroni told him that the Book of Mormon was "a true record of great worth" and that he should become a Mormon preacher.Granger was baptized at Sodus, New York, by Brigham Young and was ordained to be an elder of the Church of Christ by Young on the same day.Almost immediately, Granger set out on a mission for the young church.