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While these things were going on in the interior of the country, the Scythians sent down a detachment of their forces to the banks of the Danube, to see if they could not, in some way or other, obtain possession of the bridge. They learned here what the orders were which Darius had given to the Ionians who had been left in charge, in respect to the time of their remaining at their post. The Scythians told them that if they would govern themselves strictly by those orders, and so break up the bridge and go down the river with their boats as soon as the two months should have expired, they should not be molested in the mean time. The Ionians agreed to this. The time was then already nearly gone, and they promised that, so soon as it should be fully expired, they would withdraw.
The Scythian detachment sent back word to the main army acquainting them with these facts, and the army accordingly resolved on a change in their policy. Instead of harassing and distressing the Persians as they had done, to hasten their departure, they now determined to improve the situation of their enemies, and encourage them in their hopes, so as to protract their stay. They accordingly allowed the Persians to gain the advantage over them in small skirmishes, and they managed, also, to have droves of cattle fall into their hands, from time to time, so as to supply them with food. The Persians were quite elated with these indications that the tide of fortune was about to turn in their favor.
While things were in this state, there appeared one day at the Persian camp a messenger from the Scythians, who said that he had some presents from the Scythian chief for Darius. The messenger was admitted, and allowed to deliver his gifts. The gifts proved to be a bird, a mouse, a frog, and five arrows. The Persians asked the bearer of these strange offerings what the Scythians meant by them. He replied that he had no explanations to give. His orders were, he said, to deliver the presents and then return; and that they must, accordingly, find out the meaning intended by the exercise of their own ingenuity.
When the messenger had retired, Darius and the Persians consulted together, to determine what so strange a communication could mean. They could not, however, come to any satisfactory decision. Darius said that he thought the three animals might probably be intended to denote the three kingdoms of nature to which the said animals respectively belonged, viz., the earth, the air, and the water; and as the giving up of weapons was a token of submission, the whole might mean that the Scythians were now ready to give up the contest, and acknowledge the right of the Persians to supreme and universal dominion.
The officers, however, did not generally concur in this opinion. They saw no indications, they said, of any disposition on the part of the Scythians to surrender. They thought it quite as probable that the communication was meant to announce to those who received it threats and defiance, as to express conciliation and submission. "It may mean," said one of them, "that, unless you can fly like a bird into the air, or hide like a mouse in the ground, or bury yourselves, like the frog, in morasses and fens, you can not escape our arrows."
There was no means of deciding positively between these contradictory interpretations, but it soon became evident that the former of the two was very far from being correct; for, soon after the present was received, the Scythians were seen to be drawing up their forces in array, as if preparing for battle. The two months had expired, and they had reason to suppose that the party at the bridge had withdrawn, as they had promised to do. Darius had been so far weakened by his harassing marches, and the manifold privations and sufferings of his men, that he felt some solicitude in respect to the result of a battle, now that it seemed to be drawing near, although such a trial of strength had been the object which he had been, from the beginning, most eager to secure.
The two armies were encamped at a moderate distance from each other, with a plain, partly wooded, between them. While in this position, and before any hostile action was commenced by either party, it was observed from the camp of Darius that suddenly a great tumult arose from the Scythian lines. Men were seen rushing in dense crowds this way and that over the plain, with shouts and outcries, which, however, had in them no expression of anger or fear, but rather one of gayety and pleasure. Darius demanded what the strange tumult meant. Some messengers were sent out to ascertain the cause, and on their return they reported that the Scythians were hunting a hare, which had suddenly made its appearance. The hare had issued from a thicket, and a considerable portion of the army, officers and soldiers, had abandoned their ranks to enjoy the sport of pursuing it, and were running impetuously, here and there, across the plain, filling the air with shouts of hilarity.
"They do indeed despise us," said Darius, "since, on the eve of a battle, they can lose all thoughts of us and of their danger, and abandon their posts to hunt a hare!"
That evening a council of war was held. It was concluded that the Scythians must be very confident and strong in their position, and that, if a general battle were to be hazarded, it would be very doubtful what would be the result. The Persians concluded unanimously, therefore, that the wisest plan would be for them to give up the intended conquest, and retire from the country. Darius accordingly proceeded to make his preparations for a secret retreat.
He separated all the infirm and feeble portion of the army from the rest, and informed them that he was going that night on a short expedition with the main body of the troops, and that, while he was gone, they were to remain and defend the camp. He ordered the men to build the camp fires, and to make them larger and more numerous than common, and then had the asses tied together in an unusual situation, so that they should keep up a continual braying. These sounds, heard all the night, and the light of the camp fires, were to lead the Scythians to believe that the whole body of the Persians remained, as usual, at the encampment, and thus to prevent all suspicion of their flight.
Toward midnight, Darius marched forth in silence and secrecy, with all the vigorous and able-bodied forces under his command, leaving the weary, the sick, and the infirm to the mercy of their enemies. The long column succeeded in making good their retreat, without exciting the suspicions of the Scythians. They took the route which they supposed would conduct them most directly to the river.
When the troops which remained in the camp found, on the following morning, that they had been deceived and abandoned, they made signals to the Scythians to come to them, and, when they came, the invalids surrendered themselves and the camp to their possession. The Scythians then, immediately, leaving a proper guard to defend the camp, set out to follow the Persian army. Instead, however, of keeping directly upon their track, they took a shorter course, which would lead them more speedily to the river. The Persians, being unacquainted with the country, got involved in fens and morasses, and other difficulties of the way, and their progress was thus so much impeded that the Scythians reached the river before them.
They found the Ionians still there, although the two months had fully expired. It is possible that the chiefs had received secret orders from Darius not to hasten their departure, even after the knots had all been untied; or perhaps they chose, of their own accord, to await their sovereign's return. The Scythians immediately urged them to be gone. "The time has expired," they said, "and you are no longer under any obligation to wait. Return to your own country, and assert your own independence and freedom, which you can safely do if you leave Darius and his armies here."