The twenty-four gold plates spoken of should not be confused with the other record of the Jaredites. This other record was a large stone which was brought to king Mosiah and gave an account of Coriantumr and the origin of the Jaredites (Omni 1:20-22). The 24 gold plates, on the other hand, were found by Limhi's scouts who were sent north to find Zarahemla (Mosiah 8:7-10). What happened to the plates next? When the people of Limhi were finally freed from their Lamanite captors, they fled to Zarahemla and gave the record to king Mosiah (the grandson of the Mosiah who translated the stone). This Mosiah translated the record using the Urim and Thummim (Mosiah 28:11-14). It seems most probable that Moroni took his abridgment from Mosiah's translation, otherwise he would have had to translate the record all over again.