The place of general rendezvous for the various forces which were to join in the expedition, consisting of the army which marched with Darius from Susa, and also of the troops and ships which the maritime provinces of Asia Minor were to supply on the way, was on the shores of the Bosporus, at the point where Mandrocles had constructed the bridge.[G] The people of Ionia, a region situated in Asia Minor, on the shores of the Ægean Sea, had been ordered to furnish a fleet of galleys, which they were to build and equip, and then send to the bridge. The destination of this fleet was to the Danube. It was to pass up the Bosporus into the Euxine Sea, now called the Black Sea, and thence into the mouth of the river. After ascending the Danube to a certain point, the men were to land and build a bridge across that river, using, very probably, their galleys for this purpose. In the mean time, the army was to cross the Bosporus by the bridge which had been erected there by Mandrocles, and pursue their way toward the Danube by land, through the kingdom of Thrace. By this arrangement, it was supposed that the bridge across the Danube would be ready by the time that the main body of the army arrived on the banks of the river. The idea of thus building in Asia Minor a bridge for the Danube, in the form of a vast fleet of galleys, to be sent round through the Black Sea to the mouths of the river, and thence up the river to its place of destination, was original and grand. It strikingly marks the military genius and skill which gave the Greeks so extended a fame, for it was by the Greeks that the exploit was to be performed.
[Footnote G: For the track of Darius on this expedition, see the map at the commencement of this volume.]
Darius marched magnificently through Asia Minor, on his way to the Bosporus, at the head of an army of seventy thousand men. He moved slowly, and the engineers and architects that accompanied him built columns and monuments here and there, as he advanced, to commemorate his progress. These structures were covered with inscriptions, which ascribed to Darius, as the leader of the enterprise, the most extravagant praise. At length the splendid array arrived at the place of rendezvous on the Bosporus, where there was soon presented to view a very grand and imposing scene.
The bridge of boats was completed, and the Ionian fleet, consisting of six hundred galleys, was at anchor near it in the stream. Long lines of tents were pitched upon the shore, and thousands of horsemen and of foot soldiers were drawn up in array, their banners flying, and their armor glittering in the sun, and all eager to see and to welcome the illustrious sovereign who had come, with so much pomp and splendor, to take them under his command. The banks of the Bosporus were picturesque and high, and all the eminences were crowded with spectators, to witness the imposing magnificence of the spectacle.
Darius encamped his army on the shore, and began to make the preparations necessary for the final departure of the expedition. He had been thus far within his own dominions. He was now, however, to pass into another quarter of the globe, to plunge into new and unknown dangers, among hostile, savage, and ferocious tribes. It was right that he should pause until he had considered well his plans, and secured attention to every point which could influence success.
He first examined the bridge of boats. He was very much pleased with the construction of it. He commended Mandrocles for his skill and fidelity in the highest terms, and loaded him with rewards and honors. Mandrocles used the money which Darius thus gave him in employing an artist to form a piece of statuary which should at once commemorate the building of the bridge and give to Darius the glory of it. The group represented the Bosporus with the bridge thrown over it, and the king on his throne reviewing his troops as they passed over the structure. This statuary was placed, when finished, in a temple in Greece, where it was universally admired. Darius was very much pleased both with the idea of this sculpture on the part of Mandrocles, and with the execution of it by the artist. He gave the bridge builder new rewards; he recompensed the artist, also, with similar munificence. He was pleased that they had contrived so happy a way of at the same time commemorating the bridging of the Bosporus and rendering exalted honor to him.
The bridge was situated about the middle of the Bosporus; and as the strait itself is about eighteen miles long, it was nine miles from the bridge to the Euxine Sea. There is a small group of islands near the mouth of this strait, where it opens into the sea, which were called in those days the Cyanean Islands. They were famed in the time of Darius for having once been floating islands, and enchanted. Their supernatural properties had disappeared, but there was one attraction which still pertained to them. They were situated beyond the limits of the strait, and the visitor who landed upon them could take his station on some picturesque cliff or smiling hill, and extend his view far and wide over the blue waters of the Euxine Sea.
Darius determined to make an excursion to these islands while the fleet and the army were completing their preparations at the bridge. He embarked, accordingly, on board a splendid galley, and, sailing along the Bosporus till he reached the sea, he landed on one of the islands. There was a temple there, consecrated to one of the Grecian deities. Darius, accompanied by his attendants and followers, ascended to this temple, and, taking a seat which had been provided for him there, he surveyed the broad expanse of water which extended like an ocean before him, and contemplated the grandeur of the scene with the greatest admiration and delight.
At length he returned to the bridge, where he found the preparations for the movement of the fleet and of the army nearly completed. He determined, before leaving the Asiatic shores, to erect a monument to commemorate his expedition, on the spot from which he was to take his final departure. He accordingly directed two columns of white marble to be reared, and inscriptions to be cut upon them, giving such particulars in respect to the expedition as it was desirable thus to preserve. These inscriptions contained his own name in very conspicuous characters as the leader of the enterprise; also an enumeration of the various nations that had contributed to form his army, with the numbers which each had furnished. There was a record of corresponding particulars, too, in respect to the fleet. The inscriptions were the same upon the two columns, except that upon the one it was written in the Assyrian tongue, which was the general language of the Persian empire, and upon the other in the Greek. Thus the two monuments were intended, the one for the Asiatic, and the other for the European world.
At length the day of departure arrived. The fleet set sail, and the immense train of the army put itself in motion to cross the bridge.[H] The fleet went on through the Bosporus to the Euxine, and thence along the western coast of that sea till it reached the mouths of the Danube. The ships entered the river by one of the branches which form the delta of the stream, and ascended for two days. This carried them above the ramifications into which the river divides itself at its mouth, to a spot where the current was confined to a single channel, and where the banks were firm. Here they landed, and while one part of the force which they had brought were occupied in organizing guards and providing defenses to protect the ground, the remainder commenced the work of arranging the vessels of the fleet, side by side, across the stream, to form the bridge.