disinterred it,[833] the story being based on the belief that heads or bodies of great warriors still had a powerful influence.[834] The representation of the head of a god, like his whole image, would be thought to possess the same preservative power. A possible survival of the sacrifice of the aged may be found in a Breton custom of applying a heavy club to the head of old persons to lighten their death agonies, the clubs having been formerly used to kill them. They are kept in chapels, and are regarded with awe.[835] Animal victims were also frequently offered. The Galatian Celts made a yearly sacrifice to their Artemis of a sheep, goat, or calf, purchased with money laid by for each animal caught in the chase. Their dogs were feasted and crowned with flowers.[836] Further details of this ritual are unfortunately lacking. Animals captured in war were sacrificed to the war-gods by the Gauls, or to a river-god, as when the horses of the defeated host were thrown into the Rhine by the Gaulish conquerors of Mallius.[837] We have seen that the white oxen sacrificed at the mistletoe ritual may once have been representatives of the vegetation-spirit, which also animated the oak and the mistletoe. Among the insular Celts animal sacrifices are scarcely mentioned in the texts, probably through suppression by later scribes, but the lives of Irish saints contain a few notices of the custom, e.g. that of S. Patrick, which describes the gathering of princes, chiefs, and Druids at Tara to sacrifice victims to idols.[838] In Ireland the peasantry still kill a sheep or heifer for S. Martin on his festival, and ill-luck is thought to follow the non-observance of the rite.[839] Similar sacrifices on saints' days in Scotland and Wales occurred in Christian times.[840] An excellent instance is that of the sacrifice of bulls at Gairloch for the cure of lunatics on S. Maelrubha's day (August 25th). Libations of milk were also poured out on the hills, ruined chapels were perambulated, wells and stones worshipped, and divination practised. These rites, occurring in the seventeenth century, were condemned by the Presbytery of Dingwall, but with little effect, and some of them still survive.[841] In all these cases the saint has succeeded to the ritual of an earlier god. Mr. Cook surmises that S. Maelrubha was the successor of a divine king connected with an oak and sacred well, the god or spirit of which was incarnate in him. These divine kings may at one time have been slain, or a bull, similarly incarnating the god or spirit, may have been killed as a surrogate. This slaying was at a later time regarded as a sacrifice and connected with the cure of madness.[842] The rite would thus be on a parallel with the slaying of the oxen at the mistletoe gathering, as already interpreted. Eilean Maree (Maelrubha), where the tree and well still exist, was once known as Eilean mo righ ("the island of my king"), or Eilean a Mhor Righ ("of the great king"),