Constantius Chorus also bore the names of Flavius Valerius.

B.—THE CAMPAIGN OF MARIUS.

For determining this the following points must be settled:—

I. Where was his camp?

To fix the position of his camp we must see where he could best watch the barbarians cross the Rhone, in such a place as he would have his rear covered, and where he could keep open his communications with Rome, and receive both reinforcements and victuals.

Now there is absolutely no point that answers these requirements like S. Gabriel. It was certain that the barbarians would not cross at Arles, for they could not advance thence south of the chain of Les Alpines, owing to the lagoons and morasses, and the desert of the Great Crau. They must cross below Avignon and at or above Tarascon. Now, as they would almost certainly march along the high table-land that extends from Montpellier by Nimes to Beaucaire, and not wade through the marshes below these hills, they would arrive with dry feet at Beaucaire, and there, naturally would cross and follow up the valley of the Durance. S. Gabriel was a natural watch-tower, whence Marius could observe them. It is an ancient Roman settlement. Numerous Roman remains have been found there. Marius had but to mount the heights behind the little town, and he commanded all the country to the north-west and south for a vast distance. Then, again, by means of his canal, connecting the lagoons, he was able to bring ships with supplies under his walls. His canal opened out of the Etang de Galéjon, with a station at Fos, not at the exact entrance of the canal, which was low and marshy, but at the entrance of the channel of Martigues that opens into the Etang de Berre. Through Galéjon it ran north, cutting through a chain of lagoons, passed under Mont Majeur to S. Gabriel, and there probably received the waters, the overspill of the Durance, above Château Renard. Plutarch says that it was connected with the Rhone, but this was probably an error. Its course to S. Gabriel remained in use and falling into decay in the Middle Ages as the Canal des Lonnes. Between S. Gabriel and the Etang de Galéjon it could also be traced, and bore the name of Le Vigueirat. This canal of Marius was perfectly protected from the barbarians by the morasses that intervened between it and the Rhone.

II. To determine his march.

The old pre-Roman road from Nimes to Aix certainly followed the high and dry ground to Tarascon, thence traced up the valley of the Durance. It could no longer follow the high ground, as that is broken into limestone peaks, but it followed up the river below them, carried above the rubble of the Durance. The first station after Tarascon was Glanum, now S. Remi. Then it went to Orgon, where it touched the Durance for the first time, and whence branched the roads to Italy—one by Mont Genèvre, the other by Aix and the coast. I suppose that Marius, following the barbarians, he on the heights, they in the valley, observed the direction they took to right or to left, from the precipitous crags of Orgon. It must be remembered that Marius had an army made up of demoralised soldiers, who had escaped from defeat by the barbarians, and of raw levies, and all were in deadly fear of their savage foes, so that he dare not bring them to a pitched battle till they had become accustomed to the sight of the Teutons and Ambrons, and were themselves impatient to come to blows with them.

The host of invaders turned south towards Aix. Marius pursued: there can, I think, be little question that he pursued the same tactics, exchanging a sandstone range for one of limestone, and following them steadily step by step, keeping the heights.

Now, if the camp of Marius was at S. Gabriel, and if the Teutons marched up the Durance valley to Orgon, and then turned to Aix, then, it seemed to me, on the spot, that no one save an idiot in command of the Roman soldiers could have done anything else than strike for the sandstone ridge and march along that, still observing the enemy.