It is worthy of remark, that the three natives seen at Horse-shoe Island had lost the two upper front teeth; and Dampier, in speaking of the inhabitants of the Northwest Coast, says, "the two front teeth of the upper jaw are wanting in all of them, men and women, old and young." Nothing of the kind was observed in the natives of the islands in Torres' Strait, nor at Keppel, Hervey's, or Glass-house Bays, on the East Coast; yet at Port Jackson, further south, it is the custom for the boys, on arriving at the age of puberty, to have _one_ of the upper front teeth knocked out, but no more; nor are the girls subjected to the same operation. At Twofold Bay, still further south, no such custom prevails, nor did I observe it at Port Phillip or King George's Sound, on the South Coast; but at Van Diemen's Land it seems to be used partially, for M. Labillardière says (p. 320 of the London translation), "we observed some, in whom one of the middle teeth of the upper jaw was wanting, and others in whom both were gone. We could not learn the object of this custom; but it is not general, for the greater part of the people had all their teeth." The rite of circumcision, which seemed to have been practised upon two of the three natives at Horse-shoe Island, and of which better proofs were found in other parts of the Gulph of Carpentaria, is, I believe, novel in the history of Terra Australis. On Sweers' Island, seven human skulls and many bones were found lying together, near three extinguished fires; and a square piece of timber, seven feet long, which was of teak wood, and according to the judgment of the carpenter had been a quarter-deck carling of a ship, was thrown up on the western beach. On Bentinck's Island I saw the stumps of at least twenty trees, which had been felled with an axe, or some sharp instrument of iron; and not far from the same place were scattered the broken remains of an earthen jar. Putting these circumstances together, it seemed probable that some ship from the East Indies had been wrecked here, two or three years back--that part of the crew had been killed by the Indians--and that the others had gone away, perhaps to the main land, upon rafts constructed after the manner of the natives. This could be no more than conjecture; but it seemed to be so supported by the facts, that I felt anxious to trace the route of the unfortunate people, and to relieve them from the distress and danger to which they must be exposed.