It is this last approach that I learned first and, though a smoke now hangs habitually over the entrance as a curtain, I have for myself but to push that aside to find the Divine River way still the best route into the greatest valley of the earth. Man has diverted this Divine River to very practical uses, and even changed its name, but it is hallowed still beyond all other approaches to the Great River. In a hut on the portage Père Jacques Marquette spent his last winter on earth in sickness; down the river the brave De la Salle built his Fort St. Louis on the great rock in the midst of his prairies, and still farther down his Fort Crèvecoeur. On no other affluent stream are there braver and more stirring memories of French adventure and sacrifice than move along those waters or bivouac on those banks. And so I would have one's imagination take that trail toward the Mississippi and first see it glisten beneath the tall white cliffs which stand at the portal of the Divine River entry.
Its branches are reputed to have all borne at one time the names of saints, and it had like canonization itself. But these streams of the Mississippi, like the Seine, have none or few of the qualities that make this saintly terminology appropriate. It is anthropomorphism, not canonization, that befits its temper and its lure. Mystery no longer hangs over its waters. Now that all the prairie and plain have been occupied, the mystery has fled entirely from the valley or has hidden itself in the wilderness and "bad lands." All is translated into the values of a matter- of-fact, pragmatic, industrial occupation.
These are some of the pragmatic and other facts concerning it which I have gathered from the explorers and surveyors and lovers of this region, Ogg [Footnote: Ogg, F. A., "Opening of the Mississippi," New York, 1904.] and Austin [Footnote: Austin, O. P., "Steps in the Expansion of our Territory," New York, 1903.] and Mark Twain [Footnote: Mark Twain, "Life on the Mississippi," various editions.] among them.
Its length lies wholly within the temperate zone. In this respect it is more fortunately situated than the more fertile-valleyed Amazon, since the climate here, varied and sometimes inhospitable as it is, offers conditions of human development there denied.
The main stream is two thousand five hundred and three miles in length, or more truly four thousand one hundred and ninety miles, if the Mississippi and Missouri be taken; that is, many times the length of the Seine. As Mark Twain, who is to be forever associated with its history, has said, it is "the crookedest river" in the world, travelling "one thousand three hundred miles to cover the same ground that a crow would fly over in six hundred and seventy-five." For a distance of several hundred miles the Upper Mississippi is a mile in width. Back in 1882 it was seventy miles or more [Footnote: Mark Twain, "Life on the Mississippi," p. 456.] wide when the flood was highest, and in 1912 sixty miles wide. The volume of water discharged by it into the sea is second only to the Amazon, and is greater than that of all European rivers combined—Seine, Rhine, Rhone, Po, Danube, and all the rest, omitting the Volga. The amount is estimated at one hundred and fifty-nine cubic miles annually—that is, it would fill annually a tank one hundred and fifty-nine miles long, a mile wide, and a mile high. With its tributaries it provides somewhat more than sixteen thousand miles of navigable water, more than any other system on the globe except the Amazon, and more than enough to reach from Paris to Lake Superior by way of Kamchatka and Alaska—about three-fourths of the way around the globe.
The sediment carried to the sea is estimated at four hundred million tons [Footnote: Humphrey's and Abbot's estimate.] annually. As one has put it, it would require daily for its removal five hundred trains of fifty cars, each carrying fifty tons, and would make two square miles each year over a hundred and thirty feet deep. Mark Twain in "Life on the Mississippi" is authority for the statement that the muddy water of the Missouri is more wholesome than other waters, until it has settled, when it is no better than that of the Ohio, for example. If you let a pint of it settle you will have three-fourths of an inch of mud in the bottom. His advice is to keep it stirred up. [Footnote: "Life on the Mississippi," p. 182.]
The area which it drains is roughly a million and a quarter square miles, or two-fifths of the United States. That is, as one graphic historian has visualized it in European terms, Germany, Austria-Hungary, France, and Italy could be set down within its limits and there would still be some room to spare.
The river has the strength (for the most part put to no use) of sixty million horses. The difference between high water and low water in flood conditions is in some places fifty feet, which shows that it has a wider range of moodiness than even the Seine.
The rim dividing the Mississippi basin from that of the Great Lakes is, as we have seen, low and narrow; in some places, especially in wet seasons, the watershed is indistinguishable. The waters know not which way to go. This fact furnishes the explanation of the ease with which the French explorers penetrated the valley from the north. A high mountain range kept the English colonists out of it from the east. The Spanish found no physical barriers at the south (except the water, which gave the Frenchmen help), but, as we have seen, on the other hand, they found no adequate inducement.
The isotherm which touches the southern limits of France passes midway between the source and mouth of the river. In the northern half, it has the mean annual temperature of France, England, and Germany; in the southern half, of the Mediterranean coasts.