[Sidenote: The crowning of hunting dogs on Diana’s day was probably a purificatory ceremony to cleanse them from the guilt of having killed game, the creatures of the goddess.] We have seen that at Diana’s festival it was customary to crown hunting dogs, to leave wild beasts in peace, and to perform a purificatory ceremony for the benefit of young people.[431] Some light is thrown on the meaning of these customs by a passage in Arrian’s treatise on hunting. He tells us that a good hound is a boon conferred by one of the gods upon the huntsman, who ought to testify his gratitude by sacrificing to the Huntress Artemis. Further, Arrian goes on to say: “It is right that after a successful chase a man should sacrifice and dedicate the first-fruits of his bag to the goddess, in order to purify both the hounds and the hunters, in accordance with old custom and usage.” He tells us that the Celts were wont to form a treasury for the goddess Artemis, into which they paid a fine of two obols for every hare they killed, a drachm for every fox, and four drachms for every roe. Once a year, on the birthday of Artemis, they opened the treasury, and with the accumulated fines purchased a sacrificial victim, it might be a sheep, a goat, or a calf. Having slain the animal and offered her share to the Huntress Artemis, they feasted, both men and dogs; and they crowned the dogs on that day “in order to signify,” says Arrian, “that the festival was for their benefit.”[432] The Celts to whom Arrian, a native of Bithynia, here refers were probably the Galatians of Asia Minor; but doubtless the custom he describes was imported by these barbarians, along with their native tongue[433] and the worship of the oak,[434] from their old home in Central or Northern Europe. The Celtic divinity whom Arrian identifies with Artemis may well have been really akin both to her and to the Italian Diana. We know from other sources that the Celts revered a woodland goddess of this type; thus Arduinna, goddess of the forest of the Ardennes, was represented, like Artemis and Diana, with a bow and quiver.[435] In any case the custom described by Arrian is good evidence of a belief that the wild beasts belong to the goddess of the wilds, who must be compensated for their destruction; and, taken with what he says of the need of purifying the hounds after a successful chase, the Celtic practice of crowning them at the annual festival of Artemis may have been meant to purge them of the stain they had contracted by killing the creatures of the goddess. The same explanation would naturally apply to the same custom observed by the Italians at the festival of Diana.