After observing that these tribes live chiefly from the produce of the chase, and come to town to exchange their fish for fish-hooks, bread, or rum, Cunningham adds that this trade gives rise to scenes of debauchery, that the prostitution of native females with the whites had assumed considerable proportions, “considering that the Australians lend their women to the convicts for a slice of bread or a pipe of tobacco.”[68] It is useless to cite other testimony after the chief defender of the Australian race has thus expressed himself. It is thus perfectly certain that numerous alliances have taken place and are taking place between the Europeans and the native women. The inhabitants of the colony, who could not but be aware of it, have had recourse to a singular hypothesis, accepted by Cunningham and recently by Waitz. They have imagined that the Australian husbands, excited by jealousy, killed all the new-born children of mixed blood; and to these hypothetical massacres (of which there is no proof whatever) they attribute the rarity of cross-breeds. In order that this tale should acquire some probability, it is first requisite that all the Australian women should be under the dominion of jealous and ferocious husbands, and that none of the females had the maternal instinct sufficiently developed to save her child from the fury of her husband. Cunningham, in accepting this explanation, forgets that he in the same page relates that the Australians prostitute their _gins_ to the first comer for a pipe of tobacco. Such beings would not feel themselves much dishonoured by the birth of the strange child. But here is an instance proving that the Australians are not altogether devoid of humour; showing, at least, that they have no notion of conjugal honour. Bongarri, of whom we have already spoken, and who in 1825 was the most celebrated chief of the Australian hordes of Port Jackson, treated as his son the offspring of the adulterous intercourse of his _gin_ with a convict of the place. When he was asked how it came to pass that his son had such a fair complexion, he replied jocularly, “that his wife was very fond of white bread and had partaken too much of it.” He invariably returned the same answer to inquirers.[69] If a warrior chief covered with honourable scars[70] attaches such small importance to the fidelity of his wife, and jokes about his dishonour, it is scarcely admissible that the men of his tribe should be more susceptible in this respect. Yet this very chief found it, according to Cunningham,[71] quite natural that, according to the Australian custom, the weakest of two new-born twins should be killed.