These ideas take us back to a time when it was held that the moon was not merely the measurer of time, but had powerful effects on the processes of growth and decay. Artemis and Diana, moon-goddesses, had power over all growing things, and as some Celtic goddesses were equated with Diana, they may have been connected with the moon, more especially as Gallo-Roman images of Diana have the head adorned with a crescent moon. In some cases festivals of the moon remained intact, as among the Celtiberians and other peoples to the north of them, who at the time of full moon celebrated the festival of a nameless god, dancing all night before the doors of their houses.[579] The nameless god may have been the moon, worshipped at the time of her intensest light. Moonlight dances round a great stone, with singing, on the first day of the year, occurred in the Highlands in the eighteenth century.[580] Other survivals of cult are seen in the practices of bowing or baring the head at new moon, or addressing it with words of adoration or supplication. In Ireland, Camden found the custom at new moon of saying the Lord's Prayer with the addition of the words, "Leave us whole and sound as Thou hast found us." Similar customs exist in Brittany, where girls pray to the moon to grant them dreams of their future husbands.[581] Like other races, the Celts thought that eclipses were caused by a monster attacking the moon, while it could be driven off with cries and shouts. In 218 B.C. the Celtic allies of Attalus were frightened by an eclipse, and much later Christian legislation forbade the people to assemble at an eclipse and shout, _Vince, Luna!_[582] Such a practice was observed in Ireland in the seventeenth century. At an earlier time, Irish poets addressed sun and moon as divinities, and they were represented on altars even in Christian times.[583]