Читать книгу The Expedition through the Upper Mississippi to Itasca Lake - Henry Rowe Schoolcraft - Страница 11

Table of Contents

Outlines of Itasca Lake.—Its scenery and productions.—Forest trees, deer, fish, shells.—Width of its outlet.—Altitude above the ocean.—Length of the Mississippi.—Its course above Cass Lake.—Its origin south of latitude 47 deg. 16 minutes.—General observations on the Mississippi.—Erect a flag on the island in Itasca Lake.—Commence the descent of the West, or Itascan branch of the Mississippi.—Character of its channel.—Rapids and plateaux.—Falls of Kakábikons.—Portage.—Encamp at Pine Banks.

Itasca Lake, the Lac la Biche of the French, is, in every respect, a beautiful sheet of water, seven or eight miles in extent, lying among hills of diluvial formation, surmounted with pines, which fringe the distant horizon, and form an agreeable contrast with the greener foliage of its immediate shores. Its greatest length, is from south-east to north-west, with a southern prolongation, or bay, which receives a brook. The waters are transparent and bright, and reflect a foliage produced by the elm, lynn, maple, and cherry, together with other species more abundant in northern latitudes. The lake itself is of irregular form, which will be best illustrated by the accompanying sketch. It has a single island, upon which we landed, after an hour’s paddling from the spot of our arrival and embarkation. We found here, the forest trees above named growing promiscuously with the betula and spruce. The bones of fish and of tortoise, found at the locality of former Indian camp fires, indicate the existence of these species in the lake. We observed a deer, standing in the margin of the lake. And, here, as well as throughout the lakes of the region, found the duck, teal and loon, in possession of their favorite seclusions. Innumerable shells, (a species of small helix,) were driven up on the head of the island. Other parts of the lake yield small species of the unio, which were found strewing the bed of the outlet. And it may here be remarked, that this shell exists, in the largest and heaviest species heretofore known, in the lower parts of this stream—the Mississippi having its origin here.

The outlet of Itasca Lake, is perhaps ten to twelve feet broad, with an apparent depth of twelve to eighteen inches. The discharge of water appears to be copious, compared to its inlet. Springs may, however, produce accessions which are not visible, and this is probable both from the geological character of the country, and the transparency and coolness of the water.

The height of this lake, above the sea, is an object of geographical interest, which, in the absence of actual survey, it may subserve the purposes of useful inquiry, to estimate. From notes taken on the ascent, it cannot be short of one hundred and sixty feet above Cass Lake. Adding the estimate of 1330 feet, submitted in 1820, as the elevation of that lake, the Mississippi may be considered to originate at an altitude of 1490, say 1500 feet, above the Atlantic. Its length, assuming former data as the basis, and computing it, through the Itascan, or west fork, may be placed at 3160 miles, one hundred and eighty-two of which, comprises an estimate of its length above Cass Lake. Its general course, in ascending, above the latter point, is north of west, as far as Lac Travers. Then south to its primary forks which is continued, following up the east fork to Kubbakunna Lake, and for some distance further. It then varies a short distance, north and north-west, then south-west and south, and finally south-west, to its main source in Ossowa Lake. The portage thence to Itasca Lake, is west south-west. Both these lakes appear to rise in springs, on the height of land. They are separated by about six miles of country. Their latitude, we had no means of accurately determining. From daily notes of the courses and distances, kept by Lieut. J. Allen, as indicated by a compass and watch, their position is, however, shown to be south-west, and not, as heretofore supposed, northwest, of Cass Lake. They are, in fact, a little south of west from Leech Lake, which is placed, on our best maps, in forty-seven degrees sixteen minutes. The highest northing attained by the Mississippi, is on the great diluvial plateau, containing the contiguous waters of Lakes La Salle, Marquette and Travers, which cannot vary more than a few minutes, from forty-eight degrees. These facts will explain the error of the elder geographical writers, who supposed that the parallel of forty-nine degrees would intersect the Mississippi. Its origin in the remote and unfrequented area of country between Leech Lake and Red river, probably an entire degree of latitude south of Turtle Lake, which still figures on some of our maps as its source, throws both the forks of this stream out of the usual route of the fur trade, and furnishes, perhaps the best reason why its actual sources have remained so long enveloped in obscurity.

The Mississippi river traverses more degrees of latitude than any other river in America, and the remark might, perhaps, be extended to the habitable globe. The extremes of its changes in climate and vegetable productions, are, consequently, very great. It occupies more than three thousand miles of the distance between the arctic circle and the equator. Long as it is, however, it has a tributary longer than itself, (the Missouri.) Like the Niger, its mouth was discovered by expeditions down its current, but unlike that stream, which has so long held the geographical world in suspense, its sources have been also sought from its central parts. Its entire course is, at length, known. And we may now appeal with full certainty to the Balize and to Itasca Lake, as its most extreme points. At the latter, it is a placid basin of transparent spring water. At the former, it is as turbid as earth in suspension can make it, and carries a forest of floating trees on its bosom. Below the junction of its primary forks, it expands at very unequal distances, into eight sheets of clear water, each of which has features worthy of admiration. Four of these, Lac Travers, Cass Lake, Winnepec, and Lake Pepin, are lakes of handsome magnitude, and striking scenery. The number of its tributaries of the first, and the second and the third class, is so large, that it would furnish a labor of some research, to determine it. The Missouri, the Ohio, and the Arkansas, are of the noblest class. Whoever has stood at the junction of these streams, as the writer has done, must have been impressed with an idea of magnitude and power, which words are incapable of conveying. The broadest parts of its channel lie in the central portions of its valley. Its depth is great in all its lower parts, and increases as it flows on to the Gulf, and its general descent and velocity are such as to appear very striking characteristics.7 Noble views arrest the eye of the observer, in every part of its diversified course. Originating in a heavy and extensive bed of diluvial soil, superimposed upon primitive strata, it soon wears its channel down to the latter, and after running over them for several hundred miles, plunges at length, at the Falls of St. Anthony, over the carboniferous limestone formation, which is so prevalent and so valuable for its mineral deposits, below that point. This is finally succeeded by diluvial and alluvial banks, the latter of which are semi-annually enriched by fresh deposits, and exhibit a delta as broad and as exuberant as the Nile. Like the latter, it has its cataracts in the Falls of St. Anthony and Pukaigama, and in numerous lesser leaps and cascades, where its current is tossed into foam and threatens destruction to the navigation. Such are its physical traits, and there is enough in their character, magnitude, and variety to lead our contemplations irresistibly “through nature up to nature’s God.”

Having gratified our curiosity in Itasca Lake, we prepared to leave the island, but did not feel inclined to quit the scene without leaving some memorial, however frail, of our visit. The men were directed to fell a few trees at the head of the island, thereby creating an area, for the purpose of erecting a flag staff. This was braced by forked stakes, and a small flag hoisted to its place. Taking specimens of the forest growth of the island, of a size suitable for walking canes, and adding its few species to our collections of plants and conchology, we embarked on our descent. The flag which we had erected continued to be in sight for a time, and was finally shut out from our view by a curve of the lake. We found this curve drawn out in such a manner as to form, with the opposite shore, the channel of the outlet. We soon felt our motion accelerated by a current, and began to glide, with velocity, down a clear stream with a sandy and pebbly bottom, strewed with shells and overhung by foliage. Ten feet would, in most places, reach from bank to bank, and the depth would probably average over a foot. The water was not, however, equally distributed. A strong and winding channel, made it a labor of active watchfulness for the canoe-men, to keep our frail vessels from being dashed against boulders, or torn in pieces by fallen timber or overhanging trees. Chopping with the axe, was frequently necessary to clear the passage, and no small labor was imposed by getting through the drift wood, piled up at almost every sudden bend. We were almost imperceptibly drawn into a series of rapids and petty falls where the stream was more compressed, and the water deepened; but the danger rendered tenfold greater by boulders of blackened rocks, and furious jets of the stream. We were rather hurled than paddled through these rapid passes, which increased in frequency and fury as we advanced. After being driven down about twelve miles of this species of navigation, during which the turns are very abrupt, the river displays itself, so to say, in a savannah valley, where the channel is wider and deeper, but equally, or more circuitous, and bordered with sedge and aquatic plants. This forms the first plateau. It extends eight or nine miles. The river then narrows and enters another defile, beset with an almost continued series of rapids. The sensation, in going down these, where the channel is free from stones, can be compared to nothing so aptly, as the emotion which every one has felt as the enterprise of youth has buoyed him up, in directing his tiny sled down a snow covered declivity. The brevity of the emotion takes away nothing from the truth of the comparison. The frowing rock, often rears its dark head to dispute the passage, and calls for the exertion of every muscle, in the canoe-men, to avoid, by dexterity of movement, a violent contact. Often it became necessary for them to step into the channel, and lead down the canoes, where the violence of the eddies made it impracticable otherwise to guide them. At a place called Kakábikons, or the Little-rock falls, we made a short portage. Two of the canoes, however, made the descent, but not without imminent peril, and a delay eventually greater, than if they had been carried across the portage. We descended this second series of rapids a distance of about nine miles, and encamped, at a late hour, on a high fine bank, having come altogether about thirty-two miles below Itasca Lake. Wearied with the continued exertion, the frequent wettings, and the constant anxiety, sleep soon overshadowed the whole party, “with his downy pinions.”