“At that great gathering Adam offered sacrifices on an altar built for the purpose. A remnant of that very altar remained on the spot down through the ages. On 19 May 1838, Joseph Smith and a number of his associates stood on the remainder of the pile of stones at a place called Spring Hill, Daviess County, Missouri. There the Prophet taught them that Adam again would visit in the Valley of Adam-ondi-Ahman, holding a great council as a prelude to the great and dreadful day of the Lord [see John Taylor’s Mediation and Atonement, pages 69-70]. At this council, all who have held keys of authority will give an accounting of their stewardship to Adam. Christ will then come, receive back the keys, and thus take one of the final steps preparatory to reigning personally upon the earth. (Daniel 7:9-14; teachings, p. 157.)”
Bruce R. McConkie, Mormon Doctrine (Salt Lake City, UT: Bookcraft, Inc., 1958), 21.