The Men of the Mountains, whose King swore allegiance to Isildur and the Dúnedain in the last years of the Second Age. They had worshipped Sauron in the Dark Years before the foundation of Gondor, and when the time came for them to fulfil their oath, and fight beside Isildur against their ancient master, they broke their word, and hid in the mountains. Isildur cursed them to survive without rest until their oath was fulfilled. So they haunted the Paths of the Dead throughout the Third Age, waiting for Isildur's heir to appear and grant them the chance to fulfil their word at last.