Finds of imported ceramics, especially early Chinese stonewares, are relatively rare in the mountainous interior of Sumatra. In 1977, however, Indonesian archaeologists discovered a series of five megalithic sites in Kecamatan Sumberjaya, Kabupaten Lampung Utara, about 85 kilometres northwest of Kotabumi the district administrative centre and some distance south of the road to Liwa and Krui. These sites were completely unknown in the Dutch colonial period and only came to light when Javanese immigrants moved in to the area in the nineteen fifties. Consequently, the present names by which these locations are known tend to reflect recent Javanese usage rather than indigenous nomenclature. Excavations at the complex known as Telagamukmin in Desa Purwawiwitan, Kecamatan Sumberjaya in 1980 revealed considerable quantities of locally made earthenware sherds and fragments of imported south Chinese stonewares dating from the ninth to tenth centuries, the Five Dynasties and northern Song periods in China. A bronze bracelet, two bronze blades and other metal fragments were also recovered. Quantities of ceramic sherds have also been recovered as surface finds at other locations including Batuberak and Batutameng Desa Purajaya, Ciptaarga, Bungin and Cabangdua.