Chippewa River, just referred to, comes into the Mississippi on its left bank, within half a mile of the foot of Lake Pepin. It is a tributary of prime volume, draining the Chippewa territories lying around the south and west shores of Lake Superior. Originating on the sandy tracts extending over the elevated central plains of the Wisconsin, it brings a large deposit of sand into the Mississippi, the navigation of which is visibly more embarrassed below this point with sand-bars, willow, and cotton-wood islands. At four o'clock in the afternoon we reached and landed at Wabashaw's village. It is eligibly seated on the west shore, and consists of four of the large elongated Sioux lodges before mentioned, containing a population of about sixty souls. The usual intercourse and speeches of congratulation by the Indians, and acknowledgment of the American authorities were made, and we again embarked, after a detention of forty minutes. A few miles below Wabashaw's village, we came to a high rocky or mountain island, called _La montaigne qui trompe dans l'eau_, a term which is shortened by western phraseology into TROMPLEDO mountain. This is a very remarkable feature in the geography of the Upper Mississippi. The rock is calcareous; it is, in fact, the only fast or rocky island we have encountered below the little islet at the head of the Packagama Falls. It is not only striking from its lofty elevation, but is several miles in circumference; standing in the bed of the river and parting its channel into two, it appears to be the first bold geological monument which has effectually resisted its course. We had passed this island but a short distance, and the approaches of evening began to be manifest, when a large gray wolf sprang into the river to cross it. The greatest animation at once arose in our flotilla; the canoemen bending themselves to their paddles, the auxiliary Indians of our party shouting, and the whole party assuming an unwonted excitement. A shot was soon fired from one of our rifles, but either the distance was too great, or the aim incorrect. The wolf was fully apprised of his peril, put forth all his strength, outstripped his pursuers, reached the shore, and nimbly leaped into the woods. We encamped on the west shore, a few miles below the island at seven o'clock, having been twelve hours in our canoes. The confinement of the position nobody can appreciate who has not tried it, and I hastened to stretch my legs, by ascending the river cliffs in our rear, to have a glimpse of its geology and scenery. The view westwardly was one of groves and prairies of most inviting agricultural promise. In front, the island mountain rises to an elevation which appears to have been the original geological level of the stratification before the Mississippi cut its way through it.