Page:A Voyage to Terra Australis Volume 1.djvu/373

Port Lincoln.]

ceeding visitors, some hatchets and various other articles were left in their paths, or fastened to stumps of the trees which had been cut down near our watering pits.

In expressing an opinion that these people have no means of passing the water, it must be understood to be a deduction from our having met with no canoe, or the remains of any about the port; nor with any tree in the woods from which a sufficient size of bark had been taken to make one. Upon Boston Island, however, there were abundant marks of fire; but they had the appearance, as at Thistle's Island, of having been caused by some conflagration of the woods several years before, rather than of being the small fire places of the natives.

There are kanguroos on the main land but none were caught; our efforts, both in hunting and fishing, were indeed very confined, and almost wholly unsuccessful. What has been said of the neck of land between the head of the port and Sleaford Mere may be taken as a description of the country in general: it is rocky and barren; but has a sufficient covering of grass, bushes, and small trees not to look desolate. The basis stone is granitic, with a superstratum of calcareous rock, generally in loose pieces; but in some parts, as at Boston Island, the granite is found at the surface or immediately under the soil. Behind the beach, near our watering pits, the calcareous stone was so imperfectly formed, that small shells and bits of coral might be picked out of it. This fact, with the saltness of Sleaford Mere and of a small lake on the south side of the port, accords with the coral found upon Bald Head and various other indications before mentioned, to show that this part, at least, of Terra Australis cannot have emerged very many centuries from the sea; the salt imbibed by the rocks having not yet been all washed away by the rains. In the mountains behind Port Jackson, on the East Coast, at a vastly superior elevation, salt is formed in some places by the exhalation of the water which drips from the grit-stone cliffs.