one of them refuses thus to pledge himself the others will force his mouth open and pour the blood into it. After that, even if he wishes to play the traitor and to give the doomed man warning, he cannot do so; he is bound by a physical necessity to side with the avengers whose blood he has swallowed.​[309] [Sidenote: Blood of circumcision and subincision; uses made of it. Anodynes based on the principle of homoeopathic magic.] Further, it is worth while to notice some uses made of human blood in connexion with the ceremonies of circumcision and subincision, which all lads of the Central Australian tribes have to undergo before they are recognised as full-grown men. For example, the blood drawn from them at these operations is caught in a hollow shield and taken to certain kinsmen or kinswomen, who drink it or have it smeared on their breasts and foreheads.​[310] The motive of this practice is not mentioned, but on the analogy of the preceding customs we may conjecture that it is to strengthen the relatives who partake of the blood. This interpretation is confirmed by an analogous use in Queensland of the blood drawn from a woman at the operation which in the female sex corresponds to subincision in the male; for that blood, mixed with another ingredient, is kept and drunk as a medicine by any sick person who may be in the camp at the time.​[311] Moreover, it is corroborated by a similar use of the foreskin which has been removed at circumcision; for among the southern Arunta this piece of skin is given to the younger brother of the circumcised lad and he swallows {p93} it, in the belief that it will make him grow strong and tall.​[312] In the tribe at Fowler’s Bay, who practise both circumcision and subincision, the severed foreskin is swallowed by the operator,​[313] perhaps in order to strengthen the lad sympathetically. In some tribes of North-West Australia it is the lad himself who swallows his own foreskin mixed with kangaroo flesh; while in other tribes of the same region the severed portion is taken by the relations and deposited under the bark of a large tree.​[314] The possible significance of this latter treatment of the foreskin will appear presently. Among the Kolkodoons of Cloniny, in Northern Queensland, the foreskin is strung on twine made of human hair, and is then tied round the mother’s neck “to keep off the devil.”​[315] In the Warramunga tribe the old men draw blood from their own subincised urethras in presence of the lads who a few days before have undergone the operation of subincision. The object of this custom, we are told, is to promote the healing of the young men’s wounds and to strengthen them generally.​[316] It does not appear that the blood of the old men is drunk by or smeared upon the youths; seemingly it is supposed to benefit them sympathetically without direct contact. A similar action of blood at a distance may partly explain a very singular custom observed by the Arunta women at