(November 1, 1800 – January 1866) was an early leader in the Latter-day Saint movement and an original member of the Quorum of the Twelve Apostles. He served as the first President of the Quorum of the Twelve Apostles of the Church of Jesus Christ of Latter-day Saints from 1835 to 1838. He withdrew from the church in 1838, was excommunicated from the church in 1839, and remained disaffected for almost 19 years. Marsh was rebaptized into The Church of Jesus Christ of Latter-day Saints (LDS Church) in July 1857, but never again served in church leadership positions.
As a young man, Marsh developed a pattern of traveling and working for various employers. Marsh ran away at age 14 to Chester, Vermont, and worked as a farmer for three months. Then he left for Albany, New York, working as a waiter for 18 months. He spent two years working at the New York City Hotel, then returned to Albany for a year, and then back at the New York hotel for two more years. He also spent 18 months working as a groom for Edward Griswold on Long Island, New York.
During the time Marsh was employed by Griswold, he was married to Elizabeth Godkin on his 21st birthday in 1820. After his marriage, he attempted unsuccessfully to run a grocery business for 18 months. He subsequently spent seven years working at a type foundry in Boston, Massachusetts.
In 1829, Marsh unexpectedly left his home in Boston and journeyed west, traveling with Benjamin Hall, one of his friends from the Quietist sect. In his words, «I believed the Spirit of God dictated me to make a journey west.» He stayed at Lima, New York in Livingston County for three months before returning home. On the way home, he stopped at Lyonstown, where a woman informed him of the golden plates that Joseph Smith was said to have obtained. She directed him to Palmyra, New York, and told him to seek out Martin Harris for more information.