sentences:  Accustomed to fighting in the maze of deep valleys and rushing rivers for centuries, the tribes of the Southern Highlands became territorially confined.Cut off from the outside world, and to a great extent from each other as well, the various tribes developed distinct languages and as with the people of the other highlands provinces accurate human history extended back only as far as living memory could recall, at which point it disappeared into the fog of rich mythology.Australian Mick Leahy, a gold prospector and one of the first expatriates to enter the highlands, described the region appropriately, "The Land that Time Forgot".