Passage by Alan Peter Ryan
Men around there called them the Hills of Hell. Even the Comanche called that treacherous and shadowy maze the Tortured Path, which meant roughly the same as Hell in their own tongue. Yet the Comanche had always loved those hills and the torturous narrow trails winding among them and had roamed there and camped there and even dwelt there from time unremembered. A Comanche could pass a full lifetime in those hills, sire a tribe of his own, and never come out unless it was to kill, or unless the thing to be killed went into those hills of its own volition and presented itself for death.