In 1462 Pedro de Cintra extended Portuguese exploration along the African coast and discovered Sierra Leone.
The Liberian coast has few lagoons compared with the adjoining littoral of Sierra Leone or that of the Ivory Coast.
Nowhere, perhaps, does the flora of West Africa attain a more wonderful development than in the republic of Liberia and in the adjoining regions of Sierra Leone and the Ivory Coast.
In a general way it is supposed that the lands lying between the lower St Paul's river and the Sierra Leone frontier are not much mineralized, except that in the vicinity of river mouths there are indications of bitumen.
There are three custom-houses, or ports of entry on the Sierra Leone land frontier between the Moa river on the north and the Mano on the south, and nine ports of entry along the coast.