The Yunnan theory, Mekong river migration (published in 1889) - The theory of Proto-Malays originating from Yunnan is supported by R.H Geldern, J.H.C Kern, J.R Foster, J.R Logen, Slamet Muljana and Asmah Haji Omar. Other evidences that support this theory include: stone tools found in Malay Archipelago are analogous to Central Asian tools, similarity of Malay customs and Assam customs.