From this author we first learn that the Persians having overcome the aversion of their ancestors to maritime enterprise, had established a flourishing and lucrative commerce with India. All its principal ports were visited by Persian merchants; and in most of the cities there were churches in which the service was performed by priests, ordained by a Persian archbishop.
We shall conclude our notice of Ceylon, as described by Cosmas, from the account of Sopatrus, with mentioning a few miscellaneous particulars, illustrative of the produce and commerce of the island. The sovereignty was held by two kings; one called the king of the Hyacinth, or the district above the Ghants, where the precious stones were found; the other possessed the maritime districts. In Ceylon, elephants are sold by their height; and he adds, that in India they are trained for war, whereas, in Africa, they are taken only for their ivory. Various particulars respecting the natural history of Ceylon and India, &c. are given, which are very accurate and complete: the cocoa-nut with its properties is described: the pepper plant, the buffalo, the camelopard, the musk animal, &c.: the rhinoceros, he says, he saw only at a distance; he procured some teeth of the hippopotamus, but never saw the animal itself. In the palace of the king of Abyssinia, the unicorn was represented in brass, but he never saw it. It is extraordinary that he makes no mention of cinnamon, as a production of Ceylon.
The most important points respecting the state of Eastern commerce in the age of Cosmas, as established by his information, are the following: that Ceylon was the central mart between the commerce of Europe, Africa, and the west of India, and the east of India and China; that none of the foreign merchants who visited Ceylon were accustomed to proceed to the eastern regions of Asia, but received their silks, spices, &c. as they were imported into Ceylon; and that, as cloves are particularly specified as having been imported into Ceylon from China, the Chinese at this period must have traded with the Moluccas on the one hand, and with Ceylon on the other.
Cosmas notices the great abundance of silk in Persia, which he attributes to the short land carriage between it and China.
In our account of the very early trade of Carthage, a branch of it was described from Herodotus, which the Carthaginians carried on, without the use or intervention of words, with a remote African tribe. Of a trade conducted in a similar manner, Cosmas gives us some information; according to him, the king of the Axumites, on the east coast of Africa, exchanged iron, salt, and cattle, for pieces of gold with an inland nation, whom he describes as inhabiting Ethiopia. It may be remarked in confirmation of the accuracy, both of Herodotus and of Cosmas, in what they relate on this subject, and as an illustration and proof of the permanency and power of custom among barbarous nations, that Dr. Shaw and Cadamosto (in Purchas's Pilgrimage) describe the same mode of traffic as carried on in their times by the Moors on the west coast of Africa, with the inhabitants of the banks of the Niger.
In the middle of the sixth century, an immense and expensive fleet, fitted out by the Emperor Justinian for the purpose of invading the Vandals of Africa, gives us, in the detail of its preparation and exploits, considerable insight into the maritime state of the empire at this period. Justinian assembled at Constantinople 500 transports of various sizes, which it is not easy exactly to calculate; the presumption derived from the accounts we have is, that the smallest were 30 tons, and the largest 500 tons; and that the aggregate tonnage of the whole amounted to about 100,000 tons: an immense fleet, even compared with the fleets of modern times. On board of this fleet there were 35,000 seamen and soldiers, and 5000 horses, besides arms, engines, stores, and an adequate supply of water and provisions, for a period, probably, of two or three months. Such were the transports: they were accompanied and protected by 92 light brigantines, for gallies were no longer used in the Mediterranean; on board of these vessels were 2000 rowers. The celebrated Belisarius was the commander-in-chief, both of the land and sea forces. The course of this numerous and formidable fleet was directed by the master-galley in which he sailed; this was conspicuous by the redness of its sails during the day, and by torches fixed on its mast head during night. A circumstance occurred during the first part of the voyage, which instructs us respecting the mode of manufacturing the bread used on long voyages. When the sacks which contained it were opened, it was found to be soft and unfit for use; and on enquiring into the cause, the blame was clearly traced to the person by whose orders it had been prepared. In order to save the expense of fuel, he had ordered it to be baked by the same fire which warmed the baths of Constantinople, instead of baking it twice in an oven, as was the usual and proper practice. In the latter mode, a loss of one-fourth was calculated on and allowed; and the saving occasioned by the mode adopted was probably another motive with the person under whose superintendence the bread was prepared.
During the voyage from Methone, where fresh bread was taken on board to the southern coast of Sicily, from which, according to modern language, they were to take their departure for Africa, they were becalmed, and 161 days were spent in this navigation. An incident is mentioned relating to this part of the voyage, which points out the method used by the ancients to preserve their water when at sea. As the general himself was exposed to the intolerable hardship of thirst, or the necessity of drinking bad water, that which was meant for his use was put into glass bottles, which were buried deep in the sand, in a part of the ship to which the rays of the sun could not reach. Three months after the departure of the fleet from Constantinople, the troops were landed near Carthage; Belisarius being anxious to effect this as soon as possible, as his men did not hesitate to express their belief, that they were not able to contend at once with the winds, the waves, and the barbarians. The result of this expedition was the conquest of the African provinces, Sardinia, and Corsica.
The absurd and injudicious regulations of Justinian, respecting the corn trade of the empire have been already noticed; nor did his other measures indicate, either a better acquaintance with the principles of commerce, or more regard to its interests. The masters of vessels who traded to Constantinople were often obliged to carry cargoes for him to Africa or Italy, without any remuneration; or, if they escaped this hardship, enormous duties were levied on the merchandize they imported. A monopoly in the sale of silk was granted to the imperial treasurer; and, indeed, no species of trade seems to have been open and free, except that in cloth. His addition of one-seventh to the ordinary price of copper, so that his money-changers gave only 180 ounces of that metal, instead of 210, for one-sixth of an ounce of gold, seems rather to have been the result of ignorance than of fraud and avarice; since he did not alter the gold coin, in which alone all public and private payments were made. At this time, the geographical knowledge of the Romans, respecting what had formerly constituted a portion of their empire, must have declined in a striking manner, if we may judge from the absurd and fabulous account which Procopius gives of Britain. And the commercial relations of the Britons themselves had entirely disappeared, even with their nearest neighbours; since, in the history of Gregory of Tours, there is not a single allusion to any trade between Britain and France.
At the beginning of the seventh century we glean our last notice of any event connected with the commerce and maritime enterprise of the Romans; and the same period introduces us to the rising power and commerce of the Arabians.
Alexandria, though its importance and wealth as a commercial city had long been on the wane, principally by the removal of most of the oriental trade to Persia, was still the commercial capital of the Mediterranean, and was of the utmost importance to Constantinople, which continued to draw from it an annual supply of about 250,000 quarters of corn; but in the beginning of this century it was conquered by the Persians, and the emperor was obliged to enter into a treaty with the conquerors, by which he agreed to pay a heavy and disgraceful tribute for the corn which was absolutely necessary for the support of his capital. But a sudden and most extraordinary change took place in the character of Heraclius: he roused himself from his sloth, indolence and despair; he fitted out a large fleet; exerted his skill, and displayed his courage and coolness in a storm which it encountered; carried his armies into Persia itself, and succeeded in recovering Egypt and the other provinces which the Persians had wrested from the empire.