side, eight miles above the former, where its greatest width is forty-eight yards. Bowyer's River, which enters on the north-east side, twelve miles from the establishment called "Council Bluffs," is twenty-five yards at its mouth. Soldier's River falls in on the same side as the former, at the distance of fifty-one miles, and its width is nearly double. Little Sioux River, or Eancah Waudepon, issues from two lakes; the one five, the other two, miles from the most remote branch of the River de Moins, and pursues a circuitous course to the Missouri, with which it unites in latitude 41° 42', where it measures about eighty yards. Floyd's River enters on the north-east side, a little below the mouth of the Sioux River, 850 miles from the Mississippi, where its breadth is thirtyfive yards. White Stone River, thirty yards in width, enters on the north-east side, 918 miles from the Mississippi. Poncarar River enters on the south-west side, ten miles above the Qui Court, and runs from the west, in a parallel direction with the Missouri, almost to the point of junction, 1010 miles from the Mississippi. To some distance from its mouth, it is thirty yards in width. The three rivers of the Sioux-Pass are considerable streams, which enter near to each other on the north-east side, below the Grand Detour. They have their source near the banks of the Yangton River, each * being about thirty-five yards in width. Tylor's River, thirty-five yards in breadth at its mouth, enters on the south-west side, six miles from the upper part of the Big Bend. Teton River has its origin between the lakes from which issue the White River and the southern branch of the Chayenne; at its junction it is thirty-five yards in width. Sarwarkarna, or Pork River, rises in the first range of Black Mountains, and runs a northeasterly course to the Missouri, into which it falls on the south-west side, 1397 miles from the Mississippi. On the 7th of October, the water mea sured but twenty yards from edge to edge, but is four times greater during the swell of the river. Wetarhoo River, of which the outlet is in 45° 39′, rises in the same range of mountains, and enters twenty-five miles above the former river, where it is 120 yards in width. Maripa River runs north, and afterwards south, to its entrance, near the mouth of the Wetarhoo. Wareconne River takes its rise in a point to the south of the source of the Yankton, and enters on the northeast side, above the Ricara villages. At its mouth it is thirty-five yards in breadth. Cannon-ball River rises between the branches of the Wetarhoo and the Little Missouri, and is a * On the Map of Lewis and Clarke it is named Turkey River. very considerable stream, being 140 yards in width at its entrance on the south-west side, 1500 miles from the Mississippi. It derives its name from the round sand-stones of a brown colour, from one to twelve inches in diameter, which form its bed. Mr Bradbury crossed it on horseback at some distance from its mouth, and without swimming, on the 20th of June, when the stream was muddy. It runs through a beautiful valley, and the alluvial soil is extensive on each side for about a mile. Chessehetar, or Heart River, rises near Knife River, and runs in a north-easterly direction to its junction near the six old Mandon villages, 1540 miles from the Mississippi. Near its outlet it is thirty-eight feet in width. Shepherd River, which traverses the country in a north-west direc`tion, enters below the former on the north-east side. Knife River runs in a northern direction from its source near that of the Cannon-ball River, and after receiving several streams which issue from the Turtle hills, it directs its course to the Missouri, near which its width is eighty yards. At the confluence of this river, which is 1606 miles from the Mississippi, are situated the two Minetaree, or Grosses Ventres, and Maha villages. Mr Bradbury crossed this river opposite the third village of the former, seven miles from the Fort of the Missouri Fur Company, in canoes of skin, rowed by Indian women, or Squaws. It is here about eighty yards wide; has the appearance of being deep, but is not rapid. Miry River, ten miles in width, enters on the north-east side, twenty-seven miles above the former. White Earth River, which has its source far to the north-west, in the country of the Assiniboins, passes through a beautiful and fertile valley before its junction with the Missouri, 1840 miles from the Mississippi. Its waters are clearer than those of the former. The channel is deep and navigable; and though but ten yards wide at its outlet, at a short distance upwards, it increases to sixty. Martha's River also comes from the north-west, watering an extensive, fertile, and beautiful valley. Its entrance is sixty miles beyond that of the Yellow Stone River, 1940 miles from the mouth of the Missouri. On the 1st of May the breadth of the water, from edge to edge, was but fifteen yards; during the high floods it increased to fifty. This stream has a brown yellowish tint. On their return from the Pacific Ocean, Lewis and Clarke ascertained, that, on the 5th of August 1806, the mouth of this river was a quarter of a mile lower than in the preceding year. Porcupine River, so named on account of the great number of those animals seen on its banks, comes also from the north-west, and from a source so remote, that it probably has some communication with the Athabasky country by the river Saskashawan. It enters fifty miles above Martha's River. Its waters, at their greatest height, measure 112 yards from edge to edge. On the 1st of May the breadth was but forty. The Little Dry River and Big Dry River enter on the south-west side, in a northern direction from their source, the former being 200 yards in breadth, the latter 400. Milk River. The northern branch of this river rises near the limits of Louisiana; the other branch at a considerable distance to the northwest; and they unite their waters not far from the Missouri, where they form a stream 150 yards in breadth. Gibson's River, which enters on the north-east side, is thirty-five yards in breadth. Bratton's River is a very considerable stream, which comes from the north-west country, and unites with the Missouri 2213 miles from the Mississippi. Near its mouth the Bratton is 100 yards in breadth. Mussel Shell River rises near the Rocky Mountains, and runs a north-easterly course to the Missouri, with which it unites 2270 miles from the Mississippi. It is 110 yards in width. Before its junction it receives a considerable stream, the Sakajaurea. Judith River, which also flows from a ridge of the Rocky Mountains, has a bed of 100 yards in breadth; that of the water, near the close of May, was seventy-five yards. Big Horn and Slaughter River enter on the north-east side near the Natural Walls. The latter is forty yards in width. Maria's River, 160 yards in |