Dans la Haute-Gambie

The narrative recounts a scientific expedition into the Upper Gambia, recording the route, caravan composition, interactions with local guides, and logistical difficulties including illness and supply shortages. Field investigations emphasize botanical surveys of latex-bearing trees as potential substitutes for commercial gutta, supplemented by zoological, ethnographic and geographic observations. The author details specimen collection, sketches and maps, methods of transport and local modes of production, and the administrative and commercial networks that supported the mission. Practical recommendations for exploitation and cultivation of useful species accompany observations on climate, terrain and the health risks encountered during the journey.