Not only was Mosiah a divinely inspired leader and king; he was also a seer who interpreted a "large stone . . . with engravings. . . ." (Omni 1:20-21).
The engravings gave an account of Coriantumr, the last Jaredite king. (Omni 1:21; Ether 12:1-2.) The Jaredites' ancestors "came out from the tower, at the time the Lord confounded the language of the people." (Omni 1:21.)The Jaredite colony crossed the ocean in barges to the promised land, and became a great nation. However, the wickedness of the people finally resulted in their destruction by wars and contentions. (Ether chapters 1-15.)
Coriantumr had been discovered by the people of Zarahemla, and he dwelt with them "for the sace of nine moons." (Omni 1:21.) Coriantumr wrote a partial history on the stone, which Mosiah interpreted.
The late Sidney B. Sperry said: "The finding of Coriantumr in or about the land of Zarahemla strongly suggests that the last great battles of the Jaredites took place at no very great distance away from the land of Zarahemla, a few hundred miles at most. A lonely wounded man is not likely to have wandered thousands of miles away from the site of his last great battle."