So it is no martial simile that I am using. It is a real battle that is continuously on. The gaunt sharp-shooter, pacing the embankment with Winchester in hand to shoot any burrowing confederate of the river, a rat, or mole, is a real and not an imaginary figure. And the battles that have been fought along its course are as play by the side of those yet to be waged before it is subdued by man. It is fitly the War Department of the government that has been watching its every movement, that has set the signals on its fitful tide, and that has recorded its every shift for years as if it were an animate enemy. Its changing area, velocity, discharge--items of infinite permutations--are all noted and analyzed. But the war department of the government is still almost as powerless to control the river as the Yazoo farmer who watches its changing moods, not by instruments but by the movement of an eddy in his own hidden bayou. The battle is with floods, shallows, and erosion, but it is essentially a battle with floods, for not until their strongholds are taken, controlled, is the complete conquest assured. It was control of the mouth of the river that seemed so important in early days. The effort to obtain that led ultimately to the purchase of Louisiana (that is, the west bank of the river) from the French by the United States. It was the confirmation of that security of navigation which gave the battle of New Orleans its high significance. Then the mouth (thus obtained) was found too shallow for the demands of commerce, and there followed what some one with poetic instincts has called the battle of the shoals, a battle in which General Eads, who had bridged the river at St. Louis, compelled the river by means of jetties to run deeper and carry heavier burdens. But the future battle-fields are perceived to lie toward the sources, at the eaves, as it were, of the watersheds, the headwaters of its tributaries as well as its own. No deepening, embanking, straightening, canalization of the river is to be permanently effective until all danger of flood can be removed. Wandering among those tributaries, seeing the trickling fountains of several of them, watching the timid stream in the naked, deforested fields (not knowing quite which way to go, east or west, north or south), I have been strongly appealed to by the plan of impounding in reservoirs these first waters, whose freedom (no longer restrained in youth by the sage forests) makes them libertines and wantons in the distant valleys below.