A General History and Collection of Voyages and Travels - Volume 18 / Historical Sketch of the Progress of Discovery, Navigation, and / Commerce, from the Earliest Records to the Beginning of the Nineteenth / Century, By William Stevenson

by Robert Kerr; William Stevenson

Pytheas, of Marseilles, lived a short time before Alexander the Great: he is celebrated for his knowledge in astronomy, mathematics, philosophy, and geography, and for the ardour and perseverance with which either a strong desire for information, or the characteristic commercial spirit of his townspeople, or both united, carried him forward in the path of maritime discovery. The additions, however, which he made to geography as a science, or to the sciences intimately connected with it, are more palpable and undisputed, than the extent and discoveries of his voyages.

He was the first who established a distinction of climate by the length of days and nights: and he is said to have discovered the dependence of the tides upon the position of the moon, affirming that the flood-tide depended on the increase of the moon, and the ebb on its decrease. By means of a gnomon he observed, at the summer solstice at Marseilles, that the length of the shadow was to the height of the gnomon as 120 to 41-1/5; or, in other words, that the obliquity of the ecliptic was 23:50. He relates, that in the country which he reached in his voyage to the north, the sun, at the time of the summer solstice, touched the northern part of the horizon: he pointed out three stars near the pole, with which the north star formed a square; and within this square, he fixed the true place of the pole. According to Strabo, he considered the island of Thule as the most western part of the then known world, and reckoned his longitude from thence.

With respect to the extent and discoveries of his voyage to the north, there is great difference of opinion. The veracity of Pytheas is utterly denied by Strabo and Polybius, and is strongly suspected by Dr. Vincent: on the other hand, it has found able supporters in D'Anville, Huet, Gessner, Murray of Goettingen, Gosselin, and Malte Brun; and in our opinion, though it may not be easy to ascertain what was really the country which be reached in his voyage, and though some of the particulars he mentions may be fabulous, or irreconcileable with one another, yet it seems carrying scepticism too far to reject, on these accounts, his voyage as altogether a fiction.

The account is, that Pytheas departed from Marseilles, coasted Spain, France, and the east or north-east side of Britain, as far as its northern extremity. Taking his departure from this, he continued his voyage, as he says, to the north, or perhaps to the north-east; and after six days' navigation, he arrived at a land called Thule, which he states to be 46,300 stadia from the equator. So far there is nothing improbable or inconsistent; but when he adds, that being there at the summer solstice, he saw the sun touching the northern point of the horizon, and at the same time asserts that the day and night were each of six months' continuance, there is a palpable contradiction: and when he adds, that millet was cultivated in the north of this country, and wheat in the south, and that honey abounded, he mentions productions utterly incompatible with his description of the climate and latitude.

As, however, this voyage forms an important epoch in the history of discovery, it may be proper to endeavour to ascertain what country the Thule of Pytheas really was. We have already observed, that the day's sail of an ancient vessel was 500 stadia, or 50 miles; supposing the largest stadia of 666-2/3 equal to one degree of the equator, if the vessel sailed during the night as well as day, the course run was, on an average, 1000 stadia, or 100 miles. Now, as the voyage from the extremity of Britain to Thule was of course not a coasting voyage, and as the nights in that latitude, at the season of the year when the voyage was made, were very short, (Pytheas says the night was reduced to two or three hours) we must suppose that he sailed night as well as day; and consequently, that in six days he had sailed 600 miles, either directly north or to east or west of the north, for his exact course cannot well be made out.

What country lies 600 miles to the north or the north-east of the extremity of Britain? None exactly in this direction: if, however, we suppose that Pytheas could not fix exactly the point of the compass which he steered, (a supposition by no means improbable, considering the ignorance of the ancients,) and that his course tended to the west of the north, 600 miles would bring him nearly to Greenland. There were, however, other stadia besides those by which we computed the day's sail of the ancients; and though the stadia we have taken are more generally alluded to by the ancients, yet it may be proper to ascertain what results will be produced if the other stadia are supposed to have been used in this instance. The stadia we have already founded our calculations upon will bring us to the latitude of 69° 27': the latitude of the southernmost point of Greenland is very nearly 70°. But the description given by Pytheas of the productions of the country by no means coincides with Greenland. At the same time, other parts of his description agree with this country; particularly when he says, that there the sea, the earth, and the air, seem to be confounded in one element. In the south of Greenland the longest day is two months which does not coincide with Pytheas' account; though this, as we have already pointed out, is contradictory with itself.

Let us now consider what will be the result if we suppose that a different stadia were employed: the next in point of extent to that on which we have already founded our conjectures, (there being 700 equal to one degree of the equator) will bring him to the latitude of 66° 8'; the latitude of the northernmost part of Iceland is 66° 30', coinciding with this result as nearly as possible. The description of the climate agrees with Pytheas' description; but not his account of the length of the day, nor of the productions of the country. Of the third kind of stadia, 833-1/3 were equal to one degree of the equator; calculating that 1000 of these were sailed during a day and night's voyage, Pytheas would arrive in the latitude of 55° 34', at the end of six days. This, however, is absolutely at variance with the fact, that he took his departure from the northernmost point of Britain, and would in fact bring him back from it to the entrance of the Frith of Forth. It is supposed, however, that this is the real latitude; but that the west coast of Jutland is the country at which he arrived. But this obliges us to believe that his course from the northern extremity of Britain, instead of being north or north-east, or indeed at all to the north, was in fact south-west; a supposition which cannot be admitted, unless we imagine that the ancients were totally ignorant of the course which they steered. On the other hand, Pytheas' description of the productions of Thule agrees with Jutland; the culture of millet in the north, and of wheat in the south, and the abundance of honey: there is also, about a degree to the north of the latitude of 55° 34', a part of the coast still denominated Thyland; and in the ancient language of Scandinavia, Thiuland. The account of Pytheas, that near Thule, the sea, air, and earth, seemed to be confounded in one element, is supposed by Malte Brun to allude to the sandy downs of Jutland, whose hills shift with the wind; the marshes, covered with a crust of sand, concealing from the traveller the gulf beneath, and the fogs of a peculiarly dense nature which frequently occur. We must confess, however, that the course having been north, or north-east, or north-west, for this latitude of course may be allowed in consideration of the ignorance or want of accuracy of the ancients, never can have brought Pytheas to a country lying to the south-west of the extremity of Britain.

We are not assisted in finding out the truth, if, instead of founding our calculations and conjectures on the distance sailed in the six days, we take for their basis the distance which Pytheas states Thule to be from the equator. This distance, we have already mentioned, was 46,300 stadia; which, according as the different kinds of stadia are calculated upon, will give respectively the latitude of the south of Greenland, of the north of Iceland, or of the west coast of Jutland; or, in other words, the limit of Pytheas' voyage will be determined to be in the same latitude, whether we ascertain it by the average length of the day and night's sail of the vessels of the ancients, or by the distance from the equator which he assigns to Thule. It may be proper to state, that there is a district on the coast of Norway, between the latitudes of 60° and 62°, called Thele, or Thelemarle. Ptolemy supposes this to have been the Thule of Pytheas, Pliny places it within three degrees of the pole, Eratosthenes under the polar circle. The Thule discovered by Agricola, and described by Tacitus, is evidently either the Orkney or the Shetland Islands.

It may appear presumptuous as well as useless, after this display of the difficulties attending the question, to offer any new conjecture; and many of our renders may deem it a point of very minor importance, and already discussed at too great length. It is obvious, from the detail into which we have entered, that no country exists in the latitude which must be assigned to it, whether we fix that latitude by Pytheas' statement of the distance of Thule from the equator, or by the space sailed over in six days, the productions of which at all agree with those mentioned by Pytheas. On the other hand, we cannot suppose that his course was south-west, and not at all to the north, which must have been the case, if the country at which he arrived in sailing from the northern extremity of Britain, was Jutland. The object must, therefore, be to find out a country the productions of which correspond with those mentioned by Pytheas; for, with regard to those, he could not be mistaken: and a country certainly not the least to the south of the northern part of Britain. As it is impossible that he could have reached the pole, what he states respecting the day and night being each six months long must be rejected; and his other account of the length of the day, deduced from his own observation of the sun, at the time of the summer solstice, touching the northern point of the horizon, must be received. If we suppose that this was the limit of the sun's course in that direction (which, from his statement, must be inferred), this will give us a length of day of about twenty hours, corresponding to about sixty-two degrees of north latitude. The next point to be ascertained is the latitude of his departure from the coast of Britain. There seems no good reason to believe, what all the hypothesis we have examined assume, that Pytheas sailed along the whole of the east coast of Britain: on the other hand, it seems more likely, that having passed over from the coast of France to the coast of Britain, he traced the latter to its most eastern point, that is, the coast of Norfolk near Yarmouth; from which place, the coast taking a sudden and great bend to the west, it is probable that Pytheas, whose object evidently was to sail as far north as he could, would leave the coast and stretch out into the open sea. Sailing on a north course, or rather with a little inclination to the east of the north, would bring him to the entrance of the Baltic. We have already conceived it probable that the country he describes lay in the latitude of about 62°, and six days' sail from the coast of Norfolk would bring him nearly into this latitude, supposing he entered the Baltic. The next point relates to the productions of the country: millet, wheat, and honey, are much more the characteristic productions of the countries lying on the Gulf of Finland, than they are of Jutland; and Pytheas' account of the climate also agrees better with the climate of this part of the Baltic, than with that of Jutland.

That Pythias visited the Baltic, though perhaps the Thule he mentions did not lie in this sea, is evident from the following extract from his journal, given by Pliny:--"On the shores of a certain bay called Mentonomon, live a people called Guttoni: and at the distance of a day's voyage from them, is the island Abalus (called by Timæus, Baltea). Upon this the waves threw the amber, which is a coagulated matter cast up by the sea: they use it for firing, instead of wood, and also sell it to the neighbouring Teutones." The inhabitants on the coast of the Baltic, near the Frish or Curish Sea (which is probably the bay Pytheas describes) are called in the Lithuanian language, Guddai: and so late as the period of the Crusades, the spot where amber is found was called Wittland, or Whiteland; in Lithuanian, Baltika. From these circumstances, as well as from the name Baltea given by Timaeus to the island mentioned by Pytheas, as the place where amber is cast up by the waves, there appears no doubt that Pytheas was in the Baltic Sea, though his island of Thule might not be there. As amber was in great repute, even so early as the time of Homer, who describes it as being used to adorn the golden collars, it is highly probable that Pytheas was induced to enter the Baltic for the purpose of obtaining it: in what manner, or through whose means, the Greeks obtained it in Homer's time, is not known.