a problem of growing difficulty. The danger to Italy from inroads across the Alps was perpetually before the minds of thoughtful Roman statesmen. Events were at that moment taking place among the Gallic tribes which gave point to the general uneasiness. And unwilling as the Romans were to extend their frontiers and their responsibilities in a direction so unknown and so unpromising, yet some interference either by arms or by authority beyond those existing limits was being pressed upon them in self-defence. The Transalpine Gaul of Caesar was the country included between the Rhine, the ocean, the Pyrenees, the Mediterranean, and the Alps. Within these limits, including Switzerland, there was at this time a population vaguely estimated at six or seven millions. The Roman Province stretched along the coast to the Spanish border; it was bounded on the north by the Cevennes mountains, and for some generations by the Isère; but it had been found necessary lately[1] to annex the territory of the Allobroges (Dauphine and Savoy), and the proconsular authority was now extended to within a few miles of Geneva. The rest was divided into three sections, inhabited by races which, if allied, were distinctly different in language, laws, and institutions. The Aquitani, who were connected with the Spaniards or perhaps the Basques, held the country between the Pyrenees and the Garonne. The Belgae, whom Caesar believed to have been originally Germans, extended from the mouth of the Seine to the mouth of the Rhine, and inland to the Marne and Moselle. The people whom the Romans meant especially when they spoke of Gauls occupied all the remainder. At one time the Celts had probably been masters of the whole of France, but had gradually yielded to encroachment. According to the Druids, they came out of darkness, _ab Dite Patre_; they called themselves Children of Night, counting time by nights instead of days, as we say fortnight and sennight. Comparison of language has taught us that they were a branch of the great Aryan race, one of the first which rolled westward into Europe, before Greeks or Latins had been heard of.