Among the other inconveniences which the Athenians felt from the fortifying Decelia by the Lacedemonians, it is represented by Thucydides as one of the most considerable that they could not bring over their corn from Eubea by land, passing by Oropus; but were obliged to embark it and to sail about the promontory of Sunium—a surprising instance of the imperfection of ancient navigation, for the water-carriage is not here above double the land.
I do not remember any passage in any ancient author where the growth of any city is ascribed to the establishment of a manufacture. The commerce which is said to flourish is chiefly the exchange of those commodities for which different soils and climates were suited. The sale of wine and oil into Africa, according to Diodorus Siculus, was the foundation of the riches of Agrigentum. The situation of the city of Sybaris, according to the same author, was the cause of its immense populousness, being built near the two rivers, Crathys and Sybaris. But these two rivers, we may observe, are not navigable, and could only produce some fertile valleys for agriculture and husbandry—an advantage so inconsiderable that a modern writer would scarcely have taken notice of it.
The barbarity of the ancient tyrants, together with the extreme love of liberty which animated those ages, must have banished every merchant and manufacturer, and have quite depopulated the state, had it subsisted upon industry and commerce. While the cruel and suspicious Dionysius was carrying on his butcheries, who that was not detained by his landed property, and could have carried with him any art or skill to procure a subsistence in other countries, would have remained exposed to such implacable barbarity? The persecutions of Philip II. and Louis XIV. filled all Europe with the manufacturers of Flanders and of France.