Before it was published, the plates of gold on which it had been engraven by the ancient inhabitants of the land, were shown by the angel Moroni to Oliver Cowdery, David Whitmer and Martin Harris, together with the Urim and Thummim through which the translation was effected; and their testimony to this fact was printed over their signatures on the fly-leaf of the Book of Mormon. Joseph Smith himself exhibited the plates to eight other persons, viz: Christian, Jacob, Peter and John Whitmer; Hiram Page, Joseph Smith, Sen., Hyrum Smith and Samuel H. Smith. The testimony of these eight witnesses to the effect that they had seen, and handled the plates from which the Book of Mormon had been translated, and examined the characters engraven thereon, was also printed in the first and all subsequent authorized editions of the book. [6] It must be understood that during the progress of the young Prophet's work, persecution was continuous; and slander with her thousand tongues was inventing falsehood to destroy the work of God. But while opposition was strong, the Lord from time to time raised up friends to assist him in his labors and share his responsibilities. Among such persons was one Oliver Cowdery, a young school teacher, who while following his profession in the town of Manchester, was boarding in the family of Joseph Smith's parents, from whom he learned of the revelations of God to Joseph, and of his having the record of the ancient inhabitants of America. The youthful Prophet at this time was living at Harmony, Susquehanna County, Pennsylvania. He had married a Miss Emma Hale and settled there on a piece of land purchased of his father-in-law. Oliver Cowdery went to Harmony to investigate the claims of Joseph Smith, both in respect to his receiving revelations from God and having the Book of Mormon. He became satisfied upon both points and remained with him to act as his scribe in the work of translation. In May, 1829, the work of translation drawing near to completion, they came upon a passage in the Book of Mormon respecting baptism, upon which they held different views. They retired to the woods on the 15th of May to present the matter before the Lord for further light, and while engaged in calling upon God in prayer, a personage appeared to them surrounded by a glorious light, who, as he laid his hands upon their heads, said: "Upon you my fellow servants, in the name of Messiah, I confer the priesthood of Aaron, which holds the keys of the ministering of angels, and of the gospel of repentance, and of baptism by immersion for the remission of sins; and this shall never be taken again from the earth, until the sons of Levi do offer again an offering unto the Lord in righteousness."