passes into the representative stick or {p154} stone, and thence by an easy transition to the chin, which, consequently, is soon adorned with a rich growth of beard.​[553] When a party of these same natives has returned from killing a foe, and they fear to be attacked by the ghost of the dead man in their sleep, every one of them takes care to wear the tip of the tail of a rabbit-kangaroo in his hair. Why? Because the rabbit-kangaroo, being a nocturnal animal, does not sleep of nights; and therefore a man who wears a tip of its tail in his hair will clearly be wakeful during the hours of darkness.​[554] The Unmatjera tribe of Central Australia use the tip of the tail of the same animal for the same purpose, but they draw out the sympathetic chain one link farther. For among them, when a boy has undergone subincision and is leading a solitary life in the bush, it is not he but his mother who wears the tip of the nocturnal creature’s tail in order that he may be watchful at nights, lest harm should befall him from snakes and so forth.​[555] The ancient Greeks thought that to eat the flesh of the wakeful nightingale would prevent a man from sleeping; that to smear the eyes of a blear-sighted person with the gall of an eagle would give him the eagle’s vision; and that a raven’s eggs would restore the blackness of the raven to silvery hair. Only the person who adopted this last mode of concealing the ravages of time had to be most careful to keep his mouth full of oil all the time he applied the eggs to his venerable locks, else his teeth as well as his hair would be dyed raven black, and no amount of scrubbing and scouring would avail to whiten them again.​[556] The hair-restorer was in fact a shade too powerful, and in applying it you might get more than you bargained for. [Sidenote: Homoeopathic magic of animals among the Cherokees and other American Indians.]