The reason, that may be assigned for it, appears quite natural and striking. In all that part of Louisiana, which is to the east of the Missisippi, the lands are so high in the neighbourhood of the river, that in many places the rain-water runs off from the banks of the Missisippi, and discharges itself into rivers, which fall either directly into the sea, or into lakes.
Another very probable reason is, that from the Wabache to the sea, no rain falls but in sudden gusts; which defect is compensated by the abundant dews, so that the plants lose nothing by that means. The Wabache has a course of three hundred leagues, and the Ohio has its source a hundred leagues still farther off.
In continuing to go down the Missisippi, from the Wabache to the river of the Arkansas, we observe but few rivers, and those pretty small. The most considerable is that of St. Francis, which is distant thirty and odd leagues from that of the Arkansas. It is on this river of St. Francis, that the hunters of New Orleans go every winter to make salt provisions, tallow, and bears oil, for the supply of the capital.
The river of the Arkansas, which is thirty-five leagues lower down, and two hundred leagues from New Orleans, is so denominated from the Indians of that name, who dwell on its banks, a little above its confluence with the Missisippi. It runs three hundred leagues, and its source is in the same latitude with Santa-Fé, in New Mexico, in the mountains of which it rises. It runs up a little to the north for a hundred leagues, by forming a flat elbow, or winding, and returns from thence to the south-east, quite to the Missisippi. It has a cataract, or fall, about the middle of its course. Some call it the White River, because in its course it receives a river of that name. The Great Cut-point is about forty leagues below the river of the Arkansas: this was a long circuit which the Missisippi formerly took, and which it has abridged, by making its way through this point of land.
Below this river, still going towards the sea, we observe scarce any thing but brooks or rivulets, except the river of the Yasous, sixty leagues lower down. This river runs but about fifty leagues, and will hardly admit of a boat for a great way: it has taken its name from the nation of the Yasous, and some others dwelling on its banks. Twenty-eight leagues below the river of the Yasous, is a great cliff of a reddish free-stone: over-against this cliff are the great and little whirlpools.
From this little river, we meet but with very small ones, till we come to the Red River, called at first the Marne, because nearly as big as that river, which falls into the Seine. The Nachitoches dwell on its banks, and it was distinguished by the name of that nation; but its common name, and which it still bears, is that of the Red River. It takes its rise in New Mexico, forms an elbow to the north, in the same manner as the river of the Arkansas, falls down afterwards towards the Missisippi, running south east. They generally allow it a course of two hundred leagues. At about ten leagues from its confluence it receives the Black River, or the river of the Wachitas, which takes its rise pretty near that of the Arkansas. This rivulet, or source, forms, as is said, a fork pretty near its rise, one arm of which falls into the river of the Arkansas; the largest forms the Black River. Twenty leagues below the Red River is the Little Cut-point, and a league below that point are the little cliffs.
From the Red River to the sea we observe nothing but some small brooks: but on the east side, twenty-five leagues above New Orleans, we find a channel, which is dry at low water. The inundations of the Missisippi formed this channel (which is called Manchac) below some high lands, which terminate near that place. It discharges itself into the lake Maurepas, and from thence into that of St. Louis, of which I gave an account before.
The channel runs east south-east: formerly there was a passage through it; but at present it is so choaked up with dead wood, that it begins to have no water[40] but at the place where it receives the river Amité, which is pretty large, and which runs seventy leagues in a very fine country.
A very small river falls into the lake Maurepas, to the east of Manchac. In proceeding eastward, we may pass from this lake into that of St. Louis, by a river formed by the waters of the Amité. In going to the north of this lake, we meet to the east the little river Tandgipao. From thence proceeding always east, we come to the river Quéfoncté, which is long and beautiful, and comes from the Chactaws. Proceeding in the same route, we meet the river Castin-Bayouc: we may afterwards quit the lake by the channel, which borders the same country, and proceeding eastward we meet with Pearl River which falls into this channel.
Farther up the coast, which lies from west to east, we meet St. Louis's Bay, into which a little river of that name discharges itself: farther on, we meet the river of the Paska-Ogoulas: and at length we arrive at the Bay of Mobile, which runs upwards of thirty leagues into the country, where it receives the river of the same name, which runs for about a hundred and fifty leagues from north to south. All the rivers I have just mentioned, and which fall not into the Missisippi, do in like manner run from north to south.