Before revision: Cartographers began to stop including the mountains on maps after French explorer Louis Gustave Binger established that the mountains were fictitious in his 1887–89 expedition to chart the Niger River from its mouth in the Gulf of Guinea and through Côte d'Ivoire.
After revision: ,Cartographers began to stop including the mountains on maps after French explorer Louis Gustave Binger established that the mountains were fictitious in his 1887–89 expedition to chart the Niger River from its mouth in the Gulf of Guinea and through Côte d'Ivoire.