Achilles thus detected, was prevailed on to go to Troy, after Thetis had furnished him with impenetrable armor made by Vulcan. Thither he led the troops of Thessaly, in fifty ships, and distinguished himself by a number of heroic actions; but being disgusted with Agamemnon for the loss of Briseis, he retired from the camp, and resolved to have no further concern in the war. In this resolution he continued inexorable, till news was brought him that Hector had killed his friend Patrōclus; to avenge his death he not only slew Hector, but fastened the corpse to his chariot, dragged it round the walls of Troy, offered many indignities to it, and sold it at last to Priam his father. Authors are much divided on the manner of Achilles' death; some relate that he was slain by Apollo, or that this god enabled Paris to kill him, by directing the arrow to his heel, the only part in which he was vulnerable. Others again say, that Paris murdered him treacherously, in the temple of Apollo, whilst treating about his marriage with Polyxĕna, daughter to king Priam. Though this tradition concerning his death be commonly received, yet Homer plainly enough insinuates that Achilles died fighting for his country, and represents the Greeks as maintaining a bloody battle about his body, which lasted a whole day. Achilles having been lamented by Thetis, the Nereids, and the Muses, was buried on the promontory of Sigæum; and after Troy was captured, the Greeks endeavored to appease his manes by sacrificing Polyxĕna, on his tomb, as his ghost had requested. The oracle at Dodōna decreed him divine honors, and ordered annual victims to be offered at the place of his sepulture. In pursuance of this, the Thessalians brought hither yearly two bulls, one black, the other white, crowned with wreaths of flowers, and water from the river Sperchius. It is said that Alexander, seeing his tomb, honored it by placing a crown upon it, at the same time crying out "that Achilles was happy in having, during his life, such a friend as Patrōclus, and after his death, a poet like Homer." ATLAS was son of Japĕtus and Clymĕne, and brother of Prometheus, according to most authors; or, as others relate, son of Japĕtus by Asia, daughter of Oceănus. He had many children. Of his sons, the most famous were Hespĕrus (whom some call his brother) and Hyas. By his wife Pleione he had seven daughters, who went by the general names of Atlantĭdes, or Pleiădes; and by his wife Æthra he had also seven other daughters, who bore the common appellation of the Hyădes.