Gaul was, according to the reports of the ancients, comparatively well peopled. Certain statements lead us to infer that in the Belgic districts there were some 200 persons to the square mile - a proportion such as nearly holds at present for Wales and for Livonia - in the Helvetic canton about 245[11]; it is probable that in the districts which were more cultivated than the Belgic and less mountainous than the Helvetian, as among the Bituriges, Arverni, Haedui, the number rose still higher. Agriculture was no doubt practised in Gaul - for even the contemporaries of Caesar were surprised in the region of the Rhine by the custom of manuring with marl[12], and the primitive Celtic custom of preparing beer (cervesia) from barley is likewise an evidence of the early and wide diffusion of the culture of grain - but it was not held in estimation. Even in the more civilized south it was reckoned not becoming for the free Celts to handle the plough. In far higher estimation among the Celts stood pastoral husbandry, for which the Roman landholders of this epoch very gladly availed themselves both of the Celtic breed of cattle, and of the brave Celtic slaves skilled in riding and familiar with the rearing of animals[13]. Particularly in the northern Celtic districts pastoral husbandry was thoroughly predominant. Brittany was in Caesar's time a country poor in corn. In the north-east dense forests, attaching themselves to the heart of the Ardennes, stretched almost without interruption from the German Ocean to the Rhine; and on the plains of Flanders and Lorraine, now so fertile, the Menapian and Treverian herdsman then fed his half-wild swine in the impenetrable oak-forest.
Just as in the valley of the Po the Romans made the production of wool and the culture of corn supersede the Celtic feeding of pigs on acorns, so the rearing of sheep and the agriculture in the plains of the Scheldt and the Maas are traceable to their influence. In Britain even the threshing of corn was not yet usual; and in its more northern districts agriculture was not practised, and the rearing of cattle was the only known mode of turning the soil to account. The culture of the olive and vine, which yielded rich produce to the Massiliots, was not yet prosecuted beyond the Cevennes in the time of Caesar.
The Gauls were from the first disposed to settle in groups; there were open villages everywhere, and the Helvetic canton alone numbered in 696 four hundred of these, besides a multitude of single homesteads. But there were not wanting also walled towns, whose walls of alternate layers surprised the Romans both by their suitableness and by the elegant interweaving of timber and stones in their construction; while, it is true, even in the towns of the Allobroges the buildings were erected solely of wood. Of such towns the Helvetii had twelve and the Suessiones an equal number; whereas at all events in the more northern districts, such as among the Nervii, while there were doubtless also towns, the population during war sought protection in the morasses and forests rather than behind their walls, and beyond the Thames the primitive defence of the wooden barricade altogether took the place of towns and was in war the only place of refuge for men and herds.
In close association with the comparatively considerable development of urban life stands the activity of intercourse by land and by water. Everywhere there were roads and bridges. The river-navigation, which streams like the Rhone, Garonne, Loire, and Seine, of themselves invited, was considerable and lucrative.
But far more remarkable was the maritime navigation of the Celts. Not only were the Celts, to all appearance, the nation that first regularly navigated the Atlantic ocean, but we find that the art of building and of managing vessels had attained among them a remarkable development. The navigation of the peoples of the Mediterranean had, as may readily be conceived from the nature of the waters traversed by them, for a comparatively long period adhered to the oar; the war-vessels of the Phoenicians, Hellenes, and Romans were at all times oared galleys, in which the sail was applied only as an occasional aid to the oar; the trading vessels alone were in the epoch of developed ancient civilization "sailer" properly so called[14]. On the other hand the Gauls doubtless employed in the Channel in Caesar's time, as for long afterwards, a species of portable leathern skiffs, which seem to have been in the main common oared boats, but on the west coast of Gaul the Santones, the Pictones, and above all the Veneti sailed in large though clumsily built ships, which were not impelled by oars but were provided with leathern sails and iron anchor-chains; and they employed these not only for their traffic with Britain, but also in naval combat. Here therefore we not only meet for the first time with navigation in the open ocean, but we find that here the sailing vessel first fully took the place of the oared boat - an improvement, it is true, which the declining activity of the old world did not know how to turn to account, and the immeasurable results of which our own epoch of renewed culture is employed in gradually reaping.
With this regular maritime intercourse between the British and Gallic coasts, the very close political connection between the inhabitants on both sides of the Channel is as easily explained as the flourishing of transmarine commerce and of fisheries. It was the Celts of Brittany in particular, that brought the tin of the mines of Cornwall from England and carried it by the river and land routes of Gaul to Narbo and Massilia. The statement, that in Caesar's time certain tribes at the mouth of the Rhine subsisted on fish and birds' eggs, may probably refer to the circumstance that marine fishing and the collection of the eggs of sea-birds were prosecuted there on an extensive scale. When we put together and endeavour to fill up the isolated and scanty statements which have reached us regarding the Celtic commerce and intercourse, we come to see why the tolls of the river and maritime ports play a great part in the budgets of certain cantons, such as those of the Haedui and the Veneti, and why the chief god of the nation was regarded by them as the protector of the roads and of commerce, and at the same time as the inventor of manufactures. Accordingly the Celtic industry cannot have been wholly undeveloped; indeed the singular dexterity of the Celts, and their peculiar skill in imitating any model and executing any instructions, are noticed by Caesar.
11. The first levy of the Belgic cantons exclusive of the Remi, that is, of the country between the Seine and the Scheldt and eastward as far as the vicinity of Rheims and Andernach, from 9000 to 10,000 square miles, is reckoned at about 300,000 men; in accordance with which, if we regard the proportion of the first levy to the whole men capable of bearing arms specified for the Bellovaci as holding good generally, the number of the Belgae capable of bearing arms would amount to 500,000 and the whole population accordingly to at least 2,000,000. The Helvetii with the adjoining peoples numbered before their migration 336,000; if we assume that they were at that time already dislodged from the right bank of the Rhine, their territory may be estimated at nearly 1350 square miles. Whether the serfs are included in this, we can the less determine, as we do not know the form which slavery assumed amongst the Celts; what Caesar relates (i. 4) as to the slaves, clients, and debtors of Orgetorix tells rather in favour of, than against, their being included.
That, moreover, every such attempt to make up by combinations for the statistical basis, in which ancient history is especially deficient, must be received with due caution, will be at once apprehended by the intelligent reader, while he will not absolutely reject it on that account.
12. "In the interior of Transalpine Gaul on the Rhine", says Scrofa in Varro, De R. R. i. 7, 8, "when I commanded there, I traversed some districts, where neither the vine nor the olive nor the fruit-tree appears, where they manure the fields with white Pit-chalk, where they have neither rock - nor sea-salt, but make use of the saline ashes of certain burnt wood instead of salt". This description refers probably to the period before Caesar and to the eastern districts of the old province, such as the country of the Allobroges; subsequently Pliny (H. N. xvii. 6, 42 seq.) describes at length the Gallo-Britannic manuring with marl.
13. "The Gallic oxen especially are of good repute in Italy, for field labour forsooth; whereas the Ligurian are good for nothing". (Varro, De R. R. ii. 5, 9). Here, no doubt, Cisalpine Gaul is referred to, but the cattle-husbandry there doubtless goes back to the Celtic epoch. Plautus already mentions the "Gallic ponie", (
14. We are led to this conclusion by the designation of the trading or "roun" as contrasted with the "lon" or war vessel, and the similar contrast of the "oared ship", (