I take this last part first, and (to use Eratosthenes’ own words, not those of Democritus) willing to pick my bone of contention, inquire, whether they who first made the division of the three continents were the same persons as those who first desired to distinguish their own land from that of the Carians opposite, or whether they were only acquainted with Greece, Caria, and some few other adjoining countries, and not with Europe, Asia, or Africa; but that others who followed them, and were able to write a description of the habitable earth, were the real authors of the division into three continents. How did he know that these were not the men who made this division of the habitable earth? And he who divided the earth into three parts, giving to each portion the name of “continent,” could he not form in his mind a just idea of that taken as a whole, which he had so parcelled out. But if indeed he were not acquainted with the whole habitable earth, but merely made a division of some part thereof, pray what portion of that part did he denominate Asia, or Europe, or simply continent? Such talk is altogether nonsense. 8. The reasoning of Eratosthenes, however, is still more absurd, when he declares that he sees no advantage in being acquainted with the exact boundaries of countries, and then cites the example of Colyttus and Melitè, which prove just the contrary of his assertion. Surely if a want of certainty respecting the boundaries of Thyrea and Oropus gave rise to war, a knowledge of the limits of different districts must be of practical importance. Will he tell us that the boundaries of districts, or the limits of kingdoms, may be of some service, but when applied to continents it is carrying the matter too far. We reply, it is of equal consequence here. Suppose a dispute between two powerful princes, one claiming the possession of Asia and the other of Africa, to which of these should Egypt, I mean the country called Lower Egypt, appertain. Will any one pass over such cases on account of their rarity? By no means. It is acknowledged by every one that the limits of each continent ought to be defined by some notable boundary, indicated by the configuration of the whole habitable earth. In following out this principle, we should not be very particular if they who determine boundaries by the rivers leave some districts undefined, since the rivers do not reach from sea to sea, nor leave the continents altogether as islands.