"The clouds
Sweep over with their shadows, and beneath,
The surface rolls and fluctuates to the eye;
Dark hollows seem to glide along and chase
The sunny ridges."
The diversity of light and shade upon the swells and depressions at the hour of sunrise, or when at midday clouds are drifting along the sky, is endless. A few points here and there are thrown into prominent relief; while others, deeply retreating, constitute an imaginary back-ground perfect in its kind. And then the sunlight, constantly changing its position, is received upon such a variety of angles, and these, too, so rapidly vary as the breeze rolls over the surface, that it gives the scene a wild and shifting aspect to the eye at times, barely reconcilable with the idea of reality.
As the sun reached the meridian the winds went down, and then the stillness of death hung over the prairie. The utter desolateness of such a scene is indescribable. Not a solitary tree to intercept the vision or to break the monotony; not a sound to cheer the ear or relieve the desolation; not a living [94] thing in all that vast wild plain to tell the traveller that he was not
"Alone, alone, all, all alone,
Alone on a wide, wide sea!"
It is at such a season that the question presents itself with more than ordinary vehemence to the mind, To what circumstance do these vast prairies owe their origin? Amid what terrible convulsion of the elements did these great ocean-plains heave themselves into being? What mighty voice has rolled this heaped-up surface into tumult, and then, amid the storm and the tempest, bid the curling billows stand, and fixed them there?
"The hand that built the firmament hath heaved
And smooth'd these verdant swells."
The origin of the prairie has given rise to much speculation. Some contend that we are to regard these vast plains in the same light as mountains, valleys, forests, and other grand features of Nature's workmanship. And, it is very true, plains of a character not dissimilar are to be met with all over our earth; at every degree of elevation of every extent, and of every stage of fertility, from the exhaustless fecundity of the delta of the Nile to the barren sterility of the sands of the desert. Northern Asia has her boundless pastures and steppes, where the wild Tartar feeds his flock; Africa may boast her Bedouin sands, her tablelands, and her karroos; South America her grassy llanos and pampas; Europe her purple heather; India her jungles; the southern sections of our own land their beautiful savannas; and wherefore not the [95] vast regions of the "Far West" their broad-rolling prairies? The word is of French derivation, signifying meadow; and is applied to every description of surface destitute of timber and clothed with grass. It was, then, upon their own fair prairies of Judea and Mesopotamia that the ancient patriarchs pitched their tents. The tough sward of the prairie, when firmly formed, it is well known, refuses to receive the forest; but, once broken into by the ploughshare or by any other cause, and protected from the autumnal flames, and all is soon rolling with green; and the sumach, the hazel, and the wild-cherry are succeeded by the oak. Such is the argument for the natural origin of the prairie, and its cogency none will deny. But, assuming for a moment a diluvial origin to these vast plains, as a thousand circumstances concur to indicate, and the phenomena are far more satisfactorily and philosophically resolved. In a soil so exhaustlessly fertile, the grasses and herbs would first secure possession of the surface. Even now, whenever the earth is thrown up, from whatever depth, it is immediately mossed with verdure by the countless embryos buried in its teeming bosom; a proof incontestable of secondary origin. After the grasses succeeded flowering shrubs; then the larger weeds; eventually, thickets were formed; the surface was baked and hardened by the direct rays of the sun, and the bosom of the soil, bound up as if by bands of brass and iron, utterly refused to receive or nourish the seeds of the forest now strewn over it. This is the unavoidable conclusion wherever natural [96] causes have held their sway. Upon the borders of rivers, creeks, and overflowing streams, or wherever the soil has become broken, this series of causes was interrupted, and the result we see in the numerous island-groves, and in the forests which invariably fringe the water-courses, great and small. The autumnal fires, too, aboriginal tradition informs us, have annually swept these vast plains from an era which the memory of man faileth to record, scathing and consuming every bush, shrub, or thicket which in the lapse of ages might have aspired to the dignity of a tree; a nucleus around which other trees might have clustered. Here and there, indeed, amid the heaving waste, a desolate, wind-shaken, flame-blackened oak rears its naked branches in the distance; but it is a stricken thing, and only confirms the position assumed. From a concurrence of fortuitous circumstances easily conceived, the solitary seed was received into a genial soil; the tender shrub and the sapling were protected from destruction, and at length it had struggled into the upper air, and defied alike the flames and blasts of the prairie.
The argument of analogy for the natural origin of the prairie may also be fairly questioned, since careful examination of the subject must convince any unprejudiced mind that the similarity of feature between these plains and others with which we are acquainted is not sufficiently striking to warrant comparison. The pampas, the steppes, and the sand-plains, though not unlike in the more prominent characteristics, are yet widely different [97] in configuration, extent, and soil. The prairie combines characteristics of each, exhibiting features of all in common, of no one in particular. Who would institute comparison between the dark-rolling luxuriance of the North American prairie, and the gloomy moor of Northern Europe, with its heavy, funereal mantle of heather and ling. Could the rifest fancy conjure up the weird sisters, all "so withered and so wild in their attire," upon these beautiful plains of the departed Illini! Nor do we meet in the thyme-breathing downs of "merry England," the broad rich levels of France, the grape-clad highlands of Spain, or in the golden mellowness of the Italian Campagna, with a similitude of feature sufficiently striking to identify our own glorious prairies with them. Europe can boast, indeed, no peculiarity of surface assuming like configuration or exhibiting like phenomena.
When, then, we reflect, that of all those plains which spread out themselves upon our globe, the North American prairie possesses characteristics peculiar to itself, and to be met with nowhere beside; when we consider the demonstrations of a soil of origin incontestably diluvial; when we wander over the heaving, billowy surface, and behold it strewed with the rocky offspring of another region, and, at intervals, encased in the saline crust of the ocean-sediment; when we dive into its fathomless bosom, and bring forth the crumbling relics of man and animal from sepulchres into which, for untold cycles, they have been entombed; and when we linger along those rolling streams by which they [98] are intersected, and behold upon their banks the mighty indications of whirling, subsiding floods, and behold buried in the heart of the everlasting rock productions only of the sea, the conviction is forced upon us, almost resistlessly, that here the broad ocean once heaved and roared. To what circumstance, indeed, but a revolution of nature like this, are we to refer that uniform deposition of earthy strata upon the alluvial bottom-land of every stream? to what those deep-cut race-paths which the great streams have, in the lapse of centuries, worn for themselves through the everlasting rock, hundreds of feet? to what those vast salt-plains of Arkansas? those rocky heaps of the same mineral on the Missouri, or those huge isolated masses of limestone, rearing themselves amid the lonely grandeur, a wonder to the savage? Or to what else shall we refer those collections of enormous seashells, heaped upon the soil, or thrown up to its surface from a depth of fifty feet?
Many phenomena in the Valley of the Mississippi concur to confirm the idea that its vast delta-plains, when first forsaken by the waters of the ocean, were possessed by extensive canebrakes, covering, indeed, its entire surface. If, then, we suppose the Indians, who passed from Asia to America in the early centuries of the Christian era, to have commenced the fires in autumn when the reed was like tinder, and the conflagration would sweep over boundless regions, we at once have an hypothesis which accounts for the origin of the prairies. It is at least as plausible as some others. The occasions of the autumnal fires may have been [99] various. The cane-forests must have presented an insurmountable obstacle in travelling, hunting, agriculture, or even residence; while the friction caused by the tempestuous winds of autumn may have kindled numerous fires among the dry reeds.