The Gray Mountains of the Westlands were later renamed the Mithicus Mountains after Pseudo-Duncanthrax's invasion of the Eastlands in the mid-seventh century. For at one time those who had believed that the world was but a coconut (as opposed to being flat) claimed that the two mountain ranges were the same, and that crossing one side would lead directly to the other continent. Because of this theory, when Pseudo-Duncanthrax conquered the Eastlands, the eastern mountain range was given the same name as the Westlands western mountain range—the Gray Mountains. Once it was proven that the mountain ranges were not in fact the same, the Westlands range was renamed the Mithicus Mountains. (see the entry 'Mithicus Mountains' for more information about this mountain range.)