Cæsar, Charlemagne, and Napoleon all played their great parts in the history of the Rhine, and, in later days, historians, poets, and painters of all shades of ability and opinion have done their part to perpetuate its glories.

The Rhine valley formed a part of three divisions of the ancient Gaul conquered by the Romans: La Belgica, toward the coast of the North Sea; Germanica I., with Moguntiacum (Mayence) as its capital; and Germanica II., with Colonia Agrippina (Cologne) as its chief town. The Rhine was the great barrier between the Romans and the German tribes, and, in the time of Tiberius, eight legions guarded the frontier. The political and economic influences which overflowed from the Rhine valley have been most momentous.

The Rhine formed one of the great Roman[{14}] highways to the north, and it is interesting to note that the first description of it is Cæsar's, though he himself had little familiarity with it. He wrote of the rapidity of its flow, and built, or caused to be built, a wooden bridge over it, between Coblenz and Andernach.

In the history of the Rhine we have a history of Europe. A boundary of the empire of Cæsar, it afterward gave passage to the barbarian hordes who overthrew imperial Rome. Charlemagne made it the outpost of his power, and later the Church gained strength in the cities on its banks, while monasteries and feudal strongholds rose up quickly one after another. Orders of chivalry were established at Mayence; and knights of the Teutonic order, of Rhodes, and of the Temple, appeared upon the scene. The minnesinger and the troubadour praised its wines, told of its contests, and celebrated its victories. The hills, the caves, the forests, the stream, and the solid rocks themselves were tenanted by superstition, by oreads, mermaids, gnomes, Black Huntsmen, and demons in all imaginable fantastic shapes.

Meantime the towns were growing under[{15}] the influence of trade,—the grimy power that destroyed the feudal system. The Reformed religion found an advocate at Constance in John Huss even before Luther fulminated against Rome; printing was accomplished by Gutenberg at Mayence; and now steam and electricity have awakened a new era.

Cæsar, Attila, Clovis, Charlemagne, Frederick Barbarossa, Rudolph of Hapsburg, the Palatine Frederick the First, Gustavus Adolphus, and Napoleon have been victorious upon its banks. What more could fate do to give the stream an almost immortality of fame?

Little by little there were established on the banks of the river populous posts and centres of commerce. The military camps of Drusus had grown into settled communities, until to-day are found along the Rhine the great cities of Basel, Strasburg, Speyer, Worms, Mayence, Coblenz, Cologne, and Düsseldorf, and between them are dotted a series of cities and towns less important only in size, certainly not in the magnitude of their interest for the traveller or student, nor in their storied past.

Of the more romantic, though perhaps not[{16}] more picturesque, elements of vine-clad slopes—where is produced the celebrated Rheinwein—the rapid flow of Rhine water, and the fabled dwelling-places of sprites and Rhinemaidens, there is quite enough for many an entertaining volume not yet written.

After traversing several of the cantons, the Rhine leaves Switzerland at Basel, on its course, through Germany and Holland, to the sea. Its chief tributaries are the Neckar, Murg, Kinzig, Aar, Main, Nahe, Lahn, Moselle, Erft, Ruhr, and Lippe. Its waters furnish capital salmon, which, curiously enough, when taken on their passage up the stream, are called lachse; but, when caught in autumn on their way down to the sea, are known as salmon. It affords also sturgeon, pike, carp, and lampreys. Its enormous rafts of timber have often been described, and should be seen to be appreciated. They often carried half a village of people, and were of great value. To-day these great rafts, however, are seldom seen.

In summer, when the tourist visits the river, its course is comparatively calm and orderly; it is only in spring, when the snows melt rapidly in Switzerland, that "Father Rhine" is to be beheld in all his might;[{17}] for then the waters often rise a dozen feet above their common level. Its depth from Basel to Strasburg averages ten to twelve feet; at Mayence, twenty-four feet; at Düsseldorf, fifty feet.