Ether told the Jaredites about the ministry of Jesus Christ in the meridian of time, and that would be around 300 years after the extermination of the Jaredites. He even told them about Lehi coming to America which had already occurred but the Jaredites were unaware of the Nephites since the Nephites were in the land southward. Ether also referred to the building up of the New Jerusalem in the latter days and that the promised land would become the inheritance of the seed of Joseph who was sold into Egypt.