According to ancient Chinese (977), Indian and Japanese manuscripts, western coastal cities of Borneo had become trading ports by the first millennium AD. In Chinese manuscripts, gold, camphor, tortoise shells, hornbill ivory, rhinoceros horn, crane crest, beeswax, lakawood (a scented heartwood and root wood of a thick liana, "Dalbergia parviflora"), dragon's blood, rattan, edible bird's nests and various spices were described as among the most valuable items from Borneo. The Indians named Borneo "Suvarnabhumi" (the land of gold) and also "Karpuradvipa" (Camphor Island). The Javanese named Borneo "Puradvipa", or Diamond Island. Archaeological findings in the Sarawak river delta reveal that the area was a thriving centre of trade between India and China from the 6th century until about 1300.