In Ether 10:21 we find that "the whole face of the land northward was covered with inhabitants." However, the Book of Mormon geography student is left to wonder as to just how far the "land northward" extended. If the Jaredite people were part of a civilization which built up "many mighty cities" (Ether 9:23), then we might have some clues as to just how far reaching that civilization was. Here the Book of Mormon geography student would be wise to compare, even in a general way, the known ancient civilizations on the American continent for the proposed time period. [Alan C. Miner, Personal Notes]