Colquhoun's route shown in red. Proposed route of exploration between Yunnan and Gulf of Martaban shown with broken lines. Boundaries of Southeast Asian territories and Chinese provinces are shown. Relief shown by hachures. From: Proceedings of the Royal Geographical Society and monthly record of geography. Vol. 4 (1882), no. 12, pp. 713-730; held in Firestone Library. Call number: G7 .J6873