Ammaron selects Mormon to be the official Nephite archivist, but with the understanding that the commission was as yet beyond the abilities of the ten-year-old Mormon. Therefore, Mormon was to continue his education, with the knowledge that he would eventually be a record keeper. That knowledge doubtless guided the nature of his studies, and perhaps some of the types of lessons he chose to learn well.
When Mormon turned twenty-four, he was to retrieve all of the records and begin the task of being the keeper of the large plates, and the official historian writing upon those large plates. As with previous archivists, Ammaron tells Mormon the type of information the large plates are to contain: “ye shall engrave on the plates of Nephi all the things that ye have observed concerning this people.”