Notes of a Journey on the Upper Mekong, Siam

A government-commissioned travelogue recounts an exploratory journey along the upper Mekong and connecting routes, recording topography, river navigation, local settlements, and mineral prospects encountered en route from Bangkok through Muang Nan, Chieng Kong, and Luang Prabang to Nongkhai and Khorat. The account combines practical field geology and mining observations—with attention to reported ruby and sapphire deposits—with ethnographic and logistical notes on boats, rapids, jungle travel, and village life. Descriptive chapters and appended maps and illustrations convey the physical challenges of dense forest and swift rivers while documenting routes, natural resources, and the constraints of a hurried official expedition.