Γεωγραφικα 2.1

IN the Third Book of his Geography Eratosthenes furnishes us with a chart of the habitable earth. This he divides into two portions, by a line running from east to west parallel to the equator. He makes the Pillars of Hercules the boundary of this line to the west, and to the east the farthest ridges of those mountains which bound India on the north. From the Pillars he draws the line through the Strait of Sicily, and the southern extremities of Peloponnesus and Attica, to Rhodes and the Gulf of Issus. He says, Through the whole of this distance the line mentioned is drawn across the sea and adjacent continents; the whole length of the Mediterranean as far as Cilicia extending in that direction. Thence it runs nearly in a straight line along the whole chain of the Taurus to India. The Taurus continuing in a straight line from the Pillars divides Asia through its whole length into two halves, north and south. So that both the Taurus and the sea from the Pillars hither lie under the parallel of Athens.

He then declares that the ancient geographical chart wants revision; that in it the eastern portion of the Taurus is made to run too far north, India itself being also too much drawn in the same direction. One proof which he offers in support of this is, that the most southern extremities of India are under the same latitude as Meroe, as attested by many, both from astronomical observations and the temperature of the climate. From thence to the most northerly point by the mountains of the Caucasus, there are 15,000 stadia, according to Patrocles, a writer whom we are bound to believe, both on account of his worth, and the vast amount of his geographical attainments. Now since the distance from Meroe to the parallel of Athens is nearly the same, the most northerly points of India next to the Caucasian mountains ought to be under the same degree of latitude.

But there is another method (says Eratosthenes) of proving this. The distance from the Gulf of Issus to the Euxine, proceeding in a northerly direction towards Amisus and Sinope, is about 3000 stadia, which is as much as the supposed extent of the mountains [of the Taurus]. The traveller who directs his course from Amisus due east, arrives first at Colchis, then at the high lands by the Hyrcanian Sea, afterwards at the road leading to Bactra, and beyond to the Scythians; having the mountains always on the right. The same line drawn through Amisus westward, crosses the Propontis and Hellespont. From Meroe to the Hellespont there are not more than 18,000 stadia. The distance is just the same from the southern extremity of India to the land of Bactria, if we add to the 15,000 stadia of that country the 3000 which its mountains occupy in breadth.

Hipparchus tries to invalidate this view of Eratosthenes, by sneering at the proofs on which it rests. Patrocles, he says, merits little credit, being contradicted by the two writers Deimachus and Megasthenes, who say that the distance taken from the southern ocean, is in some places 20,000, in others 30,000 stadia; that in this assertion they are supported by the ancient charts, and he considers it absurd to require us to put implicit faith in Patrocles alone, when there is so much testimony against him; or that the ancient charts should be corrected; but rather that they should be left as they are until we have something more certain on the subject.

This argument, I think, is in many instances unfounded. Eratosthenes availed himself of the statements of many writers, although Hipparchus alleges he was solely led by Patrocles. Who then are the authors of the statement that the southern extremity of India is under the same parallel as Meroe; and who are they who estimate the distance from Meroe to the parallel passing through Athens? Or who, again, were those who asserted that the whole breadth occupied by the mountains was equal to the distance from Cilicia to Amisus? Or who made known that, travelling from Amisus, the course lay in a straight line due east through Colchis, the [sea of] Hyrcania, so on to Bactria, and beyond this to the eastern ocean, the mountains being always on the right hand; and that this same line carried west in a straight line, traverses the Propontis and the Hellespont? These things Eratosthenes advances on the testimony of men who had been on the spot, and from the study of those numerous memoirs which he had for reference in that noble library which Hipparchus himself acknowledges to be gigantic.

Besides, the credibility of Patrocles can be proved by a variety of evidence—the princes who confided to him so important trusts—the authors who follow his statements—and those, too, who criticise them, whose names Hipparchus has recorded. Since whenever these are refuted, the credit of Patrocles is by so much advanced. Nor does Patrocles appear to state any thing improbable when he says that the army of Alexander took but a very hasty view of every thing [in India], but Alexander himself a more exact one, causing the whole country to be described by men well acquainted with it. Which description he says was afterwards put into his hands by Xenocles the treasurer.

Again, in the second volume of his Commentaries, Hipparchus accuses Eratosthenes of himself throwing discredit on the statement of Patrocles, on account of his differing with Megasthenes, as to the length of India on its northern side; Megasthenes stating the length at 16,000 stadia, and Patrocles at 1000 less. Being biassed by a certain Itinerary, Eratosthenes was led to reject them both on account of this discrepancy, and to follow the Itinerary. If then merely the difference of 1000 stadia is sufficient to cause the authority of Patrocles to be rejected, how much more should this be the case when we find a difference of 8000 stadia between his statement and that of two writers who agree perfectly in theirs, that the breadth of India is 20,000 stadia, while he gives only 12,000!

We reply, that [Eratosthenes] did not object [to the statement of Patrocles] merely because it differed [from that of Megasthenes], but because the statement of this latter as to the stadia was confirmed by the Itinerary, an authority of no mean importance. There is nothing wonderful in this, that though a certain statement may be credible, another may be more credible; and that while in some instances we follow the former, in others we may dissent from it on finding a more trust-worthy guide. It is ridiculous to say that the greater the difference of one writer from others, the less he should be trusted. On the contrary, such a rule would be more applicable in regard to small differences; for in little particulars the ordinary observer and the man of great ability are equally liable to err. On the other hand, in great matters, the ordinary run of men are more like to be deceived than the man of superior talent, to whom consequently in such cases greater deference is paid.

Generally speaking, the men who hitherto have written on the affairs of India, were a set of liars. Deimachus holds the first place in the list, Megasthenes comes next, while Onesicritus and Nearchus, with others of the same class, manage to stammer out a few words [of truth]. Of this we became the more convinced whilst writing the history of Alexander. No faith whatever can be placed in Deimachus and Megasthenes. They coined the fables concerning men with ears large enough to sleep in, men without any mouths, without noses, with only one eye, with spider-legs, and with fingers bent backward. They renewed Homer’s fable concerning the battles of the Cranes and Pygmies, and asserted the latter to be three spans high. They told of ants digging for gold, of Pans with wedge-shaped heads, of serpents swallowing down oxen and stags, horns and all; meantime, as Eratosthenes has observed, reciprocally accusing each other of falsehood. Both of these men were sent ambassadors to Palimbothra,—Megasthenes to Sandrocottus, Deimachus to Allitrochades his son; and such are the notes of their residence abroad, which, I know not why, they thought fit to leave. Patrocles certainly does not resemble them; nor do any other of the authorities consulted by Eratosthenes contain such absurdities.

If the meridian of Rhodes and Byzantium has been rightly determined to be the same, then that of Cilicia and Amisus has likewise been rightly determined; many observations having proved that the lines are parallel, and that they never impinge on each other.

In like manner, that the voyage from Amisus to Colchis, and the route to the Caspian, and thence on to Bactra, are both due east, is proved by the winds, the seasons, the fruits, and even the sun-risings. Frequently evidence such as this, and general agreement, are more to be relied on than the measurement taken by means of instruments. Hipparchus himself was not wholly indebted to instruments and geometrical calculations for his statement that the Pillars and Cilicia lie in a direct line due east. For that part of it included between the Pillars and the Strait of Sicily he rests entirely on the assertion of sailors. It is therefore incorrect to say that, because we cannot exactly determine the duration of the longest and shortest days, nor the degree of shadow of the gnomon throughout the mountainous region between Cilicia and India, that therefore we are unable to decide whether the line traced obliquely on the ancient charts should or should not be parallel, and consequently must leave it unreformed, keeping it oblique as the ancient charts have it. For in the first place, not to determine any thing is to leave it undetermined; and to leave a thing undetermined, is neither to take one view of the matter nor the other: but to agree to leave it as the ancients have, that is to take a view of the case. It would have been more consistent with his reasoning, if he had told us to leave Geography alone altogether, since we are similarly unable to determine the position of the Alps, the Pyrenees, and the mountains of Thrace, Illyria, and Germany. Wherefore should we give more credit to the ancient writers than to the modern, when we call to mind the numerous errors of their charts which have been pointed out by Eratosthenes, and which Hipparchus has not attempted to defend.

But the system of Hipparchus altogether teems with difficulties. Reflect for an instant on the following absurdity; after admitting that the southern extremity of India is under the same degree of latitude as Meroe, and that the distance from Meroe to the Strait of Byzantium is about 18,000 stadia, lie then makes the distance from the southern extremity of India to the mountains 30,000 stadia. Since Byzantium and Marseilles are under the same parallel of latitude, as Hipparchus tells us they are, on the authority of Pytheas, and since Byzantium and the Dnieper have also the same meridian, as Hipparchus equally assures us, if we take his assertion that there is a distance of 3700 stadia between Byzantium and the Dnieper, there will of course be a like difference between the latitude of Marseilles and the Dnieper. This would make the latitude of the Dnieper identical with that of Keltica next the Ocean; for on proceeding 3700 stadia [north of Marseilles], we reach the ocean.

Again, we know that the Cinnamon Country is the most southerly point of the habitable earth. According to Hipparchus’s own statement, the latitude of this country, which marks the commencement of the temperate zone, and likewise of the habitable earth, is distant from the equator about 8800 stadia. And since he likewise says that from the equator to the parallel of the Dnieper there are 34,000 stadia, there will remain a distance of 25,200 stadia between the parallel of the Dnieper (which is the same as that which passes over the side of Keltica next the Ocean) to that which separates the torrid from the temperate zone. It is said that the farthest voyages now made north of Keltica are to Ierne, which lies beyond Britain, and, on account of its extreme cold, barely sustains life; beyond this it is thought to be uninhabitable. Now the distance between Keltica and Ierne is estimated at not more than 5000 stadia; so that on this view they must have estimated the whole breadth of the habitable earth at 30,000 stadia, or just above.

Let us then transport ourselves to the land opposite the Cinnamon Country, and lying to the east under the same parallel of latitude; we shall there find the country named Taprobane. This Taprobane is universally believed to be a large island situated in the high seas, and lying to the south opposite India. Its length in the direction of Ethiopia is above 5000 stadia, as they say. There are brought from thence to the Indian markets, ivory, tortoise-shells, and other wares in large quantities. Now if this island is broad in proportion to its length, we cannot suppose that the whole distance, inclusive of the space which separates it from India, is less than 3000 stadia, which is equal to the distance of the southern extremity of the habitable earth from Meroe, since the [southern] extremities of India and Meroe are under the same parallel. It is likely there are more than 3000 stadia, but taking this number, if we add thereto the 30,000 stadia, which Deimachus states there are between [the southern extremity of India] and the country of the Bactrians and Sogdians, we shall find both of these nations lie beyond the temperate zone and habitable earth. Who will venture to affirm such to be the case, hearing, as they must, the statement made both by ancients and moderns of the genial climate and fertility of northern India, Hyrcania, Aria, Margiana, and Bactriana also? These countries are all equally close to the northern side of the Taurus, Bactriana being contiguous to that part of the chain which forms the boundary of India. A country blessed with such advantages must be very far from uninhabitable. It is said that in Hyrcania each vine produces a metrete of wine, and each fig tree 60 medimni of fruit. That the grains of wheat which fall from the husk on to the earth spring up the year following; that bee-hives are in the trees, and the leaves flow with honey. The same may be met with in the part of Media called Matiana, and also in Sacasena and Araxena, countries of Armenia. In these three it is not so much to be wondered at, since they lie more to the south than Hyrcania, and surpass the rest of the country in the beauty of their climate; but in Hyrcania it is more remarkable. It is said that in Margiana you may frequently meet with a vine whose stock would require two men with outstretched arms to clasp it, and clusters of grapes two cubits long. Aria is described as similarly fertile, the wine being still richer, and keeping perfectly for three generations in unpitched casks. Bactriana, which adjoins Aria, abounds in the same productions, if we except olives.

That there are cold regions in the high and mountainous parts of these countries is not to be wondered at; since in the [more] southern climates the mountains, and even the tablelands, are cold. The districts next the Euxine, in Cappadocia, are much farther north than those adjoining the Taurus. Bagadania, a vast plain, situated between the mountains of Argaeus and Taurus, hardly produces any fruit trees, although south of the Euxine Sea by 3000 stadia; while the territory round Sinope, Amisus, and Phanaroea abounds in olives.
The Oxus, which divides Bactriana from Sogdiana, is said to be of such easy navigation that the wares of India are brought up it into the sea of Hyrcania, and thence successively by various other rivers to the districts near the Euxine.

Can one find any fertility to compare with this near to the Dnieper, or that part of Keltica next the ocean, where the vine either does not grow at all, or attains no maturity. However, in the more southerly portions of these districts, close to the sea, and those next the Bosphorus, the vine brings its fruit to maturity, although the grapes are exceedingly small, and the vines are covered up all the winter. And in the parts near the mouth of the Palus Maeotis, the frost is so strong that a general of Mithridates defeated the barbarians here in a cavalry engagement during the winter, and on the very same spot in a naval fight in summer, when the ice was thawed. Eratosthenes furnishes us with the following inscription, which he found in the temple of Aesculapius at Panticapaeeon, on a brazen vase which had been broken by the frost:—
If any one doubts the intensity of our winter’s cold, let him believe when he sees this vase. The priest Stratius placed it here, not because he considered it a worthy offering to the god, but as a proof of the severity of our winter.
Since therefore the provinces we have just enumerated [are so superior in climate, that they] cannot be compared with the countries surrounding the Bosphorus, nor even the regions of Amisus and Sinope, (for every one will admit that they are much superior to these latter,) it would be idle to compare them with the districts near the Borysthenes and the north of Keltica; for we have shown that their temperature is not so low as Amisus, Sinope, Byzantium, and Marseilles, which are universally acknowledged to be 3700 stadia south of the Dnieper and Keltica.

If the followers of Deimachus add to the 30.000 stadia the distance to Taprobane and the boundaries of the torrid zone, which cannot be reckoned less than 4000 stadia, they will then remove Bactria and Aria from their actual localities and place them 34,000 stadia from the torrid zone, a distance equal to that which Hipparchus states to be between the equator and [the mouth of] the Dnieper, and the two countries will therefore be removed 8800 stadia north of [the mouth of] the Dnieper and Keltica; for there are reckoned to be 8800 stadia from the equator to the parallel of latitude which separates the temperate from the torrid zone, and which crosses the Cinnamon Country. We have proved that the regions not more than 5000 stadia north of Keltica, as far as Ierne, are scarcely habitable, but their reasoning leads to the conclusion that there is another circle fitted for the habitation of man, although 3800 stadia north of Ierne. And that Bactra is still farther north than the mouth of the Caspian or Hyrcanian Sea, which is distant about 6000 stadia from the recess of the Caspian and the mountains of Armenia and Media, and which appears to be the most northerly point of the whole coast as far as India, with a sea navigable to India all the way, as Patrocles, who had the government of these regions, affirms. Now Bactriana stretches 1000 stadia farther north. Beyond this the Scythians occupy a much larger territory, bounded by the Northern Ocean: here they dwell, though to be sure theirs is a nomade life. But we ask how they could exist here at all, supposing even Bactra to be beyond the limits of the habitable globe. The distance from the Caucasus to the Northern Sea through Bactra would be rather more than 4000 stadia. This being added to the number of stadia north of Ierne above-mentioned, will give us the whole amount of uninhabitable land from Ierne northward 7800 stadia, and even omitting the 4000 stadia altogether, those parts of Bactriana next the Caucasus will still be 3800 stadia farther north than Ierne, and 8800 farther north than Keltica, and [the mouth] of the Dnieper.

Hipparchus narrates that at the Dnieper and [the north of] Keltica, during the whole of the summer nights there is one continued twilight from sun-set to sun-rise, but at the winter solstice the sun never rises more than nine cubits above the horizon. He adds that this phenomenon is yet more remarkable in regions 6300 stadia north of Marseilles, (these regions he supposes to be peopled by Kelts, but I believe are inhabited by Britons, and 2500 stadia north of Keltica,) where the sun at the winter solstice rises only six cubits above the horizon. That at 9100 stadia north of Marseilles it only rises four cubits, and not so much as three in the countries beyond, and which I consider much farther north than Ierne. However, Hipparchus, on the authority of Pytheas, places them south of Britain, and says that the longest day there consists only of 19 hours; while in countries where the sun rises but four cubits above the horizon, and which are situated 9100 stadia north of Marseilles, the day has 18 hours. Consequently [according to his hypothesis] the most southerly parts of Britain must be north of these regions. They must therefore be under the same parallel, or almost the same, as the parts of Bactriana next to the Caucasus, which I have shown are, according to the followers of Deimachus, 3800 stadia farther north than Ierne. Now if we add this to the number between Marseilles and Ierne, we shall get 12,500 stadia. But who ever made known to us that, in those parts, I mean, in the vicinity of Bactra, this was the duration of the longest day, or the height which the sun attains in the meridian at the winter solstice? All these things are patent to the eyes of every man, and require no mathematical investigation; therefore they certainly would have been mentioned by numerous writers both amongst the ancients who have left us histories of Persia, and by the later writers too, who have carried them down to our own time. How, too, would their fertility, which I have described above, harmonize with such a latitude? The facts here advanced are sufficient to give an idea of the learned manner in which Hipparchus attempts to controvert the reasoning of Eratosthenes by mere petitiones principii.

Again, Eratosthenes wished to show the ignorance of Deimachus, and his want of information concerning such matters, as proved by his assertion that India lies between the autumnal equinox and winter tropic. Also in his blaming Megasthenes, where he says that in the southern parts of India the Greater and Lesser Bear are seen to set, and the shadows to fall both ways; assuring us that such is not the case in India. These assertions, says Eratosthenes, arise from the ignorance of Deimachus. For it is nothing else than ignorance to suppose that the autumnal equinox is not equally distant from the tropics with the vernal; since in both equinoxes the sun rises at the same point, and performs a similar revolution. Further, [he continues,] the distance from the terrestrial tropic to the equator, between which, according to Deimachus himself, India is situated, has been proved by measurement to be much less than 20,000 stadia, consequently his own statements prove that my assertion is correct, and not his. For supposing India to be twenty or thirty thousand stadia [in breadth] it could not be contained in the given space, but if my estimate be taken it is simple enough. It is another evidence of his want of information, to say that the two Bears are not seen to set, or the shadows to fall both ways, in any part of India, since 5000 stadia south of Alexandria both of these phenomena are observable. Thus reasons Eratosthenes; whom Hipparchus again criticises in the same mistaken way. First he substitutes [in the text of Deimachus] the summer in place of the winter tropic; then he says that the evidence of a man ignorant of astronomy ought not to be received in a mathematical question; as if Eratosthenes in the main had actually been guided by the authority of Deimachus. Could he not see that Eratosthenes had followed the general custom in regard to idle reasoners, one means of refuting whom is to show that their arguments, whatever they may be, go only to confirm our views.

It is by assuming as a fact that the southern extremity of India is under the same parallel as Meroe, a thing affirmed and believed by most writers, that we shall be best able to show the absurdities of the system of Hipparchus. In the first book of his Commentaries he does not object to this hypothesis, but in the second book he no longer admits it; we must examine his reasons for this. He says, when two countries are situated under the same parallel, but separated by a great distance, you cannot be certain that they are exactly under the same parallel, unless the climata of both the places are found to be similar. Now Philo, in his account of a voyage by sea to Ethiopia, has given us the clima of Meroe. He says that at that place the sun is vertical forty-five days before the summer solstice, he also informs us of the proportion of shadow thrown by the gnomon both at the equinoxes and solstices. Eratosthenes agrees almost exactly with Philo. But not a single writer, not even Eratosthenes, has informed us of the clima of India; but if it is the case, as many are inclined to believe on the authority of Nearchus, that the two Bears are seen to set in that country, then certainly Meroe and the southern extremity of India cannot be under the same parallel. [Such is the reasoning of Hipparchus, but we reply,] If Eratosthenes confirms the statement of those authors who tell us that in India the two Bears are observed to set, how can it be said that not a single person, not even Eratosthenes, has informed us of any thing concerning the clima of India? This is itself information on that point. If, however, he has not confirmed this statement, let him be exonerated from the error. Certain it is he never did confirm the statement. Only when Deimachus affirmed that there was no place in India from which the two Bears might be seen to set, or the shadows fall both ways, as Megasthenes had asserted, Eratosthenes thereupon taxed him with ignorance, regarding as absolutely false this two-fold assertion, one half of which, namely, that concerning the shadows not falling both ways, Hipparchus himself acknowledged to be false; for if the southern extremity of India were not under the same parallel as Meroe, still Hipparchus appears to have considered it south of Syene.

In the instances which follow, Hipparchus, treating of these subjects, either asserts things similar to those which we have already refuted, or takes for granted matters which are not so, or draws improper sequences. For instance, from the computation [of Eratosthenes] that the distance from Babylon to Thapsacus is 4800 stadia, and thence northward to the mountains of Armenia 2100 stadia more, it does not follow that, starting from the meridian of that city, the distance to the northern mountains is above 6000 stadia. Besides, Eratosthenes never says that the distance from Thapsacus to these mountains is 2100 stadia, but that a part thereof has never yet been measured; so that this argument [of Hipparchus], founded on a false hypothesis, amounts to nothing. Nor (lid Eratosthenes ever assert that Thapsacus lies more than 4500 stadia north of Babylon.

Again, Hipparchus, ever anxious to defend the [accuracy of the] ancient charts, instead of fairly stating the words of Eratosthenes concerning his third section of the habitable earth, wilfully makes him the author of an assertion easy of disproof. For Eratosthenes, following the opinion we before mentioned, that a line drawn from the Pillars of Hercules across the Mediterranean, and the length of the Taurus, would run due west and east, divides, by means of this line, the habitable earth into two portions, which he calls the northern and southern divisions; each of these he again essays to subdivide into as many smaller partitions as practicable, which he denominates sections. He makes India the first section of the southern part, and Ariana the second; these two countries possessing a good outline, he has been able not only to give us an accurate statement of their length and breadth, but an almost geometrically exact description of their figure. He tells us that the form of India is rhomboidal, being washed on two of its sides by the southern and eastern oceans [respectively], which do not deeply indent its shores, The two remaining sides are contained by its mountains and the river [Indus], so that it presents a kind of rectilinear figure. As to Ariana, he considered three of its sides well fitted to form a parallelogram; but of the western side he could give no regular definition, as it was inhabited by various nations; nevertheless he attempts an idea of it by a line drawn from the Caspian Gates to the limits of Carmania, which border on the Persian Gulf. This side he calls western, and that next the Indus eastern, but he does not tell us they are parallel to each other; neither does he say this of the other sides, one bounded by the mountains, and the other by the sea; he simply calls them north and south.