rivers and in the winding of the creeks, a thing difficult even for the most experienced navigator to do during those thick wool-like mists called smokes, which hang about the whole Bight from November till May (the dry season), sometimes lasting all day, sometimes clearing off three hours after sunrise.
The upper or north-westerly part of the swamp is round the mouths of the Niger, and it successfully concealed this fact from geographers down to 1830, when the series of heroic journeys made by Mungo Park, Clapperton, and the two Landers finally solved the problem—a problem that was as great and which cost more men's lives than even the discovery of the sources of the Nile.
That this should have been so may seem very strange to us who now have been told the answer to the riddle; for the upper waters of this great river were known of before Christ and spoken of by Herodotus, Pliny and Ptolemy, and its mouths navigated continuously along by the seaboard by trading vessels since the fifteenth century, but they were not recognised as belonging to the Niger. Some geographers held that the Senegal or the Gambia was its outfall; others that it was the Zaire (Congo); others that it did not come out on the West Coast at all, but got mixed up with the Nile in the middle of the continent, and so on. Yet when you come to know the swamps this is not so strange. You find on going up what looks like a big river—say Forcados, two and a half miles wide at the entrance and a real bit of the Niger. Before you are up it far great, broad, business-like-looking river entrances open on either side, showing wide rivers, mangrove-walled, but two-thirds of them are utter frauds which will ground you within half an hour of your entering them. Some few of them do communicate with other main channels to the great upper river, and others are main channels themselves; but most of them intercommunicate with each other and lead nowhere in particular, and you can't even get there because of their shallowness. It is small wonder that the earlier navigators did not get far up them in sailing ships, and that the problem had to be solved by men descending the main stream of the Niger before it commences
