I am aware of the fact that Tsomo tretung ('Como Chamling'), situate north of Mount Kangchenjunga , and south of the Tibetan city of Shigatse is historically a part of Sikkim, and was depicted thus in old maps of Sikkim and Tibet.Can any person who has more information furnish details apropos this issue.Near Tsomo Tretung, is the town of Dobtra, and is situate near the towns of Tinki Dz, and Kamba Dz.