When Apollo left King Admetus and returned to the halls of Olympus, he had not rested there long before he found that there was further service for him to render on the earth. Among the many noted deeds that he performed, the most famous was his slaying of a monstrous serpent called the Python, which was born of the slime that remained on the surface of the earth after the Deluge.[10] Apollo killed the creature with his golden arrows, and then went to the help of Neptune, who, though a powerful deity in his own realm, was often obliged to ask help of the other gods when he wished to accomplish anything on land. Hearing that Neptune wished to build a great wall around the city of Troy, and remembering the aid that the sea-god had given his mother Latona in her great need, Apollo went down to the sea and offered his services to Neptune. Of course no son of Jupiter could be expected to do the work of a slave, but this was not necessary, even in the building of a wall; for Apollo sat down on a grassy bank near by, and, with his lyre in his hand, began to play such exquisite music that the very stones were bewitched, and rising from the ground of their own accord took their places in the wall. Still under the spell of Apollo's music, others followed in quick succession, and the wall rose higher and higher, until before nightfall the whole work was finished. When the last stone had dropped into place, Apollo stopped his playing and returned to the bright halls of Olympus; while Neptune, shaking the salt spray from his shaggy eyebrows, stared hard at the walls that had risen by magic before his wondering eyes. II