The Thong Dynasty in the Taint region and bordered by the Flange Mountains lasted from about 80CM to 90CM and existed in a narrow strip, along the Skid Valley, known as the Pe Ri Nee Um Way. Evidence has been found of a triangular encampment at the end of the valley on an overgrown hill known as the Pu Den Da. Archeology has shown that Pu Den Da is unusual in that it has two gates - one large outer set and one smaller inner set. There is conflicting evidence as to whether the inner set were visible from the outside.