But they are not useful merely to individuals; the fate of the clan as a whole is bound up with theirs. Their loss is a disaster; it is the greatest misfortune which can happen to the group.[331] Sometimes they leave the ertnatulunga, for example when they are loaned to other groups.[332] Then follows a veritable public mourning. For two weeks, the people of the totem weep and lament, covering their bodies with white clay just as they do when they have lost a relative.[333] And the churinga are not left at the free disposition of everybody; the ertnatulunga where they are kept is placed under the control of the chief of the group. It is true that each individual has special rights to some of them;[334] yet, though he is their proprietor in a sense, he cannot make use of them except with the consent and under the direction of the chief. It is a collective treasury; it is the sacred ark of the clan.[335] The devotion of which they are the object shows the high price that is attached to them. The respect with which they are handled is shown by the solemnity of the movements.[336] They are taken care of, they are greased, rubbed, polished, and when they are moved from one locality to another, it is in the midst of ceremonies which bear witness to the fact that this displacement is regarded as an act of the highest importance.[337] Now in themselves, the churinga are objects of wood and stone like all others; they are distinguished from profane things of the same sort by only one particularity: this is that the totemic mark is drawn or engraved upon them. So it is this mark and this alone which gives them their sacred character. It is true that according to Spencer and Gillen, the churinga serve as the residence of an ancestor's soul and that it is the presence of this soul which confers these properties.[338] While declaring this interpretation inexact, Strehlow, in his turn, proposes another which does not differ materially from the other: he claims that the churinga are considered the image of the ancestor's body, or the body itself.[339] So, in any case, it would be sentiments inspired by the ancestor which fix themselves upon the material object, and convert it into a sort of fetish. But in the first place, both conceptions,--which, by the way, scarcely differ except in the letter of the myth,--have obviously been made up afterwards, to account for the sacred character of the churinga. In the constitution of these pieces of wood and bits of stone, and in their external appearance, there is nothing which predestines them to be considered the seat of an ancestral soul, or the image of his body. So if men have imagined this myth, it was in order to explain the religious respect which these things inspired in them, and the respect was not determined by the myth. This explanation, like so many mythological explanations, resolves the question only by repeating it in slightly different terms; for saying