While the Celts believed in sea-gods--Manannan, Morgen, Dylan--the sea itself was still personified and regarded as divine. It was thought to be a hostile being, and high tides were met by Celtic warriors, who advanced against them with sword and spear, often perishing in the rushing waters rather than retreat. The ancients regarded this as bravado. M. Jullian sees in it a sacrifice by voluntary suicide; M. D'Arbois, a tranquil waiting for death and the introduction to another life.[584] But the passages give the sense of an actual attack on the waves--living things which men might terrify, and perhaps with this was combined the belief that no one could die during a rising tide. Similarly French fishermen threaten to cut a fog in two with a knife, while the legend of S. Lunaire tells how he threw a knife at a fog, thus causing its disappearance.[585] Fighting the waves is also referred to in Irish texts. Thus Tuirbe Trágmar would "hurl a cast of his axe in the face of the flood-tide, so that he forbade the sea, which then would not come over the axe." Cúchulainn, in one of his fits of anger, fought the waves for seven days, and Fionn fought and conquered the Muireartach, a personification of the wild western sea.[586] On the French coast fishermen throw harpoons at certain harmful waves called the Three Witch Waves, thus drawing their blood and causing them to subside.[587] In some cases human victims may have been offered to the rising waters, since certain tales speak of a child set floating on the waves, and this, repeated every seven years, kept them in their place.[588] The sea had also its beneficent aspects. The shore was "a place of revelation of science," and the sea sympathised with human griefs. At the Battle of Ventry "the sea chattered, telling the losses, and the waves raised a heavy, woeful great moan in wailing them."[589] In other cases in Ireland, by a spell put on the waves, or by the intuitive knowledge of the listener, it was revealed that they were wailing for a death or describing some distant event.[590] In the beautiful song sung by the wife of Cael, "the wave wails against the shore for his death," and in Welsh myth the waves bewailed the death of Dylan, "son of the wave," and were eager to avenge it. The noise of the waves rushing into the vale of Conwy were his dying groans.[591] In Ireland the roaring of the sea was thought to be prophetic of a king's death or the coming of important news; and there, too, certain great waves were celebrated in story--Clidna's, Tuaithe's, and Rudhraidhe's.[592] Nine waves, or the ninth wave, partly because of the sacred nature of the number nine, partly because of the beneficent character of the waves, had a great importance. They formed a barrier against invasion, danger, or pestilence, or they had a healing effect.[593]