Encyclopedia of Mormonism, 1992 v. 3 p. 1114-1115 (Pratt, Orson; member of the first Quorum of the Twelve Apostles; missionary, editor, pioneer pamphleteer; born September 19, 1811at Harford, Washington County, New York; attended Schol of the Prophets in Kirtland, Ohio; Zion's Camp in 1834; 1835 ordained member of the Quorum of the Twelve Apostles; mission to British Isles; editor of the Millennial Star and The Seer, strong interest in mathematics and astronomy and published in that area; died October 3, 1881 in Salt Lake City.)
Twenty-seven rules of celestial marriage, 2008 t.p. (Orson Pratt) back cover (Orson Pratt, b. 1811 in New York; joined Church of Jesus Christ of Latter-day Saints September 1830; member of Zion's Camp in 1834; first Mormon pioneer to enter the Great Salt Lake Valley; died October 1881)