Tyndarus, the ninth king of Lacedæmon, had, by Leda, Castor and Pollux, who were twins, besides Helena, and Clytemnestra the wife of Agamemnon, king of Mycenæ. Having survived his two sons, the twins, he became anxious for a successor, and sought for a suitable husband for his daughter Helena. All the suitors bound themselves by oath to abide by the decision of the lady, who chose Menelaus, king of Sparta. She had not, however, lived above three years with her husband before she was carried off by Alexander or Paris, son of Priam, king of the Trojans. In consequence of this elopement, Menelaus called upon the rulers of the European states of Greece, and more particularly upon those who had been candidates for her hand, to avenge this Asiatic outrage. All answered to the summons, though some, like Ulysses, unwillingly. As every one knows, the siege lasted ten years; which only goes to prove the discordant parts of which the besieging army was composed: had there been union beneath a completely acknowledged head, the city could not have held out so long by many years. But Agamemnon was like Godfrey of Bouillon in the Crusades--he was only a nominal chief, without a particle of real power over the fiery and rude leaders of the troops of adventurers composing the army. This necessity for union is the principal lesson derived by posterity from the siege of Troy; but to the Asiatics of the period it must have been a premonitory warning of what they had to dread from the growing power of the Greeks. Divested of fable, and as many of the contradictions removed as possible, we believe the above to be the most trustworthy account of this celebrated affair--no one would think of going into the details after Homer. According to Bishop Ussher, the most safe chronological guide, the siege of Troy took place 1184 years before the birth of Christ, about the time that Jephtha ruled over the Jews. This last circumstance cannot fail to bring to the minds of our readers the extraordinary fact that the involuntary parental sacrifices of Iphigenia and the “daughter of Jephtha, Judge of Israel,” were contemporary. The period of the war of Troy, standing on the verge between fable and history, is a very useful one to be retained in the memory. JERUSALEM. No city in the world has enjoyed so much veneration as well as attention as Jerusalem, and yet no city has been subjected to more violence. Almost held in as much reverence by the Mahometans as the Christians, the possession of the Holy City was equally a devotional object as a territorial one, with the followers of both creeds. Jerusalem has been besieged more than twelve times, and, as in such contests, religion only seems to embitter enmities and enhance cruelties, the state of this otherwise favoured city can have been no object of envy. FIRST SIEGE, A.C. 1051.