Of course, in this contest, the advantage was on the side of Arsinoe, since she was the wife of the king himself, while Lysandra was only the wife of his son. Still, the position and the influence of Lysandra were very high. Agathocles was a prince of great consideration and honor. He had been very successful in his military campaigns, had won many battles, and had greatly extended the dominion and power of his father. He was a great favorite, in fact, both with the army and with the people, all of whom looked up to him as the hope and the pride of the kingdom.
Of course, the bestowal of all this fame and honor upon Lysandra's husband only served to excite the rivalry and hatred of Arsinoe the more. She and Lysandra were sisters, or, rather, half-sisters-being daughters of the same father. They were, however, on this very account, natural enemies to each other, for their mothers were rivals. Arsinoe, of course, was continually devising means to curtail the growing importance and greatness of Agathocles. Agathocles himself, on the other hand, would naturally make every effort to thwart and counteract her designs. In the end, Arsinoe succeeded in convincing Lysimachus that Agathocles was plotting a conspiracy against him, and was intending to take the kingdom into his own hands. This may have been true. Whether it was true or false, however, can now never be known. At all events, Lysimachus was induced to believe it. He ordered Agathocles to be seized and put into prison, and then, a short time afterward, he caused him to be poisoned. Lysandra was overwhelmed with consternation and sorrow at this event. She was, moreover, greatly alarmed for herself and for her children, and also for her brother, Ptolemy Ceraunus, who was with her at this time. It was obvious that there could be no longer any safety for her in Macedon, and so, taking with her her children, her brother, and a few friends who adhered to her cause, she made her escape from Macedon and went to Asia. Here she cast herself upon the protection of Seleucus, king of Syria.
Seleucus was another of the generals of Alexander-the only one, in fact, besides Lysimachus, who now survived. He had, of course, like Lysimachus, attained to a very advanced period of life, being at this time more than seventy-five years old. These veterans might have been supposed to have lived long enough to have laid aside their ancient rivalries, and to have been willing to spend their few remaining years in peace. But it was far otherwise in fact. Seleucus was pleased with the pretext afforded him, by the coming of Lysandra, for embarking in new wars. Lysandra was, in a short time, followed in her flight by many of the nobles and chieftains of Macedon, who had espoused her cause. Lysimachus, in fact, had driven them away by the severe measures which he had adopted against them. These men assembled at the court of Seleucus, and there, with Lysander and Ptolemy Ceraunus, they began to form plans for invading the dominions of Lysimachus, and avenging the cruel death of Agathocles. Seleucus was very easily induced to enter into these plans, and war was declared.
Lysimachus did not wait for his enemies to invade his dominions; he organized an army, crossed the Hellespont, and marched to meet Seleucus in Asia Minor. The armies met in Phrygia. A desperate battle was fought. Lysimachus was conquered and slain.
Seleucus now determined to cross the Hellespont himself, and, advancing into Thrace and Macedon, to annex those kingdoms to his own domains. Ptolemy Ceraunus accompanied him. This Ptolemy, it will be recollected, was the son of Ptolemy, king of Egypt, by his wife Eurydice; and, at first view, it might seem that he could have no claim whatever himself to the crown of Macedon. But Eurydice, his mother, was the daughter of Antipater, the general to whom Macedon had been assigned on the original division of the empire after Alexander's death. Antipater had reigned over the kingdom for a long time with great splendor and renown, and his name and memory were still held in great veneration by all the Macedonians. Ptolemy Ceraunus began to conceive, therefore, that he was entitled to succeed to the kingdom as the grandson and heir of the monarch who was Alexander's immediate successor, and whose claims were consequently, as he contended, entitled to take precedence of all others.
Moreover, Ptolemy Ceraunus had lived for a long time in Macedon, at the court of Lysimachus, having fled there from Egypt on account of the quarrels in which he was involved in his father's family. He was a man of a very reckless and desperate character, and, while a young man in his father's court, he had shown himself very ill able to brook the preference which his father was disposed to accord to Berenice and to her children over his mother Eurydice and him. In fact, it was said that one reason which led his father to give Berenice's family the precedence over that of Eurydice, and to propose that her son rather than Ptolemy Ceraunus should succeed him, was the violent and uncontrollable spirit which Ceraunus displayed. At any rate, Ceraunus quarreled openly with his father, and went to Macedon to join his sister there. He had subsequently spent some considerable time at the court of Lysimachus, and had taken some active part in public affairs. When Agathocles was poisoned, he fled with Lysandra to Seleucus; and when the preparations were made by Seleucus for war with Lysimachus, he probably regarded himself as in some sense the leader of the expedition. He considered Seleucus as his ally, going with him to aid him in the attempt to recover the kingdom of his ancestors.
Seleucus, however, had no such design. He by no means considered himself as engaged in prosecuting an expedition for the benefit of Ceraunus. His plan was the enlargement of his own dominion; and as for Ceraunus, he regarded him only as an adventurer following in his train-a useful auxiliary, perhaps, but by no means entitled to be considered as a principal in the momentous transactions which were taking place. Ceraunus, when he found what the state of the case really was, being wholly unscrupulous in respect to the means that he employed for the attainment of his ends, determined to kill Seleucus on the first opportunity.
Seleucus seems to have had no suspicion of this design, for he advanced into Thrace, on his way to Macedon, without fear, and without taking any precautions to guard himself from the danger of Ceraunus's meditated treachery. At length he arrived at a certain town which they told him was called Argos. He seemed alarmed on hearing this name, and, when they inquired the reason, he said that he had been warned by an oracle, at some former period of his life, to beware of Argos, as a place that was destined to be for him the scene of some mysterious and dreadful danger. He had supposed that another Argos was alluded to in this warning, namely, an Argos in Greece. He had not known before of the existence of any Argos in Thrace. If he had been aware of it, he would have ordered his march so as to have avoided it altogether; and now, in consequence of the anxious forebodings that were excited by the name, he determined to withdraw from the place without delay. He was, however, overtaken by his fate before he could effect his resolution. Ptolemy Ceraunus, watching a favorable opportunity which occurred while he was at Argos, came stealthily up behind the aged king, and stabbed him in the back with a dagger. Seleucus immediately fell down and died.