I have already observed that several circumstances connected with my own personal experience have led me to the conclusion, that there is no inland sea now occupying the centre of New Holland; it will be sufficient to name three of the most important of these.
First. I may mention the hot winds which in South Australia, or opposite the centre of the continent, always blow from the north, to those, who have experienced the oppressive and scorching influence of these winds, which can only be compared to the fiery and withering blasts from a heated furnace, I need hardly point out that there is little probability that such winds can have been wafted over a large expanse of water.
Secondly. I may state that between the Darling river and the head of the Great Australian Bight, I have at various points come into friendly communication with the Aborigines inhabiting the outskirts of the interior, and from them I have invariably learnt that they know of no large body of water inland, fresh or salt; that there were neither trees nor ranges, but that all was an arid waste so far as they were accustomed to travel.
Thirdly. I infer the non-existence of an inland sea, from the coincidence observable in the physical appearance, customs, character, and pursuits of the Aborigines at opposite points of the continent, whilst no such coincidence exists along the intervening lines of coast connecting those points.
With respect to the first consideration, it is unnecessary to add further remark; as regards the second, I may state, that although I may sometimes not have met with natives at those precise spots which might have been best suited for making inquiry, or although I may sometimes have had a difficulty in explaining myself to, or in understanding a people whose language I did not comprehend; yet such has not always been the case, and on many occasions I have had intercourse with natives at favourable positions, and have been able, quite intelligibly, to carry on any inquiries. One of these opportunities occurred in the very neighbourhood of the hill from which Mr. Poole is said to have seen the inland sea, as described in Captain Sturt's despatch.
There are several reasons for supposing Mr. Poole to have been deceived in forming an opinion of the objects which he saw before him from that elevation: first, I know, from experience, the extraordinary and deceptive appearances that are produced in such a country as Mr. Poole was in, by mirage and refration combined. I have often myself been very similarly deceived by the semblance of hills, islands, and water, where none such existed in reality. Secondly, in December 1843, I was within twenty-five miles of the very spot from which Mr. Poole thought he looked upon a sea, and I was then accompanied by natives, and able, by means of an interpreter, to communicate with those who were acquainted with the country to the north-west. My inquiries upon this point were particular; but they knew of no sea. They asserted that there was mud out in that direction, and that a party would be unable to travel; from which I inferred either that some branch of the Darling spread out its waters there in time of flood, or that Lake Torrens itself was stretching out in the direction indicated. Thirdly, I hold it physically impossible that a sea can exist in the place assigned to it, in as much as during an expedition, undertaken by the Surveyor-general of the Colony, in September, 1843, that officer had attained a position which would place himself and Mr. Poole at two opposite points, upon nearly the same parallel of latitude; but about 130 miles of longitude apart, in a low level country, and in which, therefore, the ranges of their respective vision from elevations would cross each other, and if there was a sea, Captain Frome must have seen it as well as Mr. Poole; again, I myself had an extensive and distant view to the north-east and east from Mount Hopeless, a low hill, about ninety miles further north than Captain Frome's position, but a little more east; yet there was nothing like a sea to be seen from thence, the dry and glazed-looking bed of Lake Torrens alone interrupting the monotony of the desert.
There are still some few points connected with our knowledge of the outskirts of the interior which leave great room for speculation, and might lead to the opinion that it is not altogether a low or a desert region. The facts which have more immediately come under my own observation, are connected, first with the presence of birds belonging to a higher and better country in the midst of a desert region, and secondly, with the line of route taken by the Aborigines in spreading over the continent, as deduced from a coincidence or dissimilarity of the manners, customs, or languages of tribes remotely apart from one another.
With respect to the presence of birds in a region such as they do not usually frequent, I may state that at Mount Arden, near the head of Spencer's Gulf, swans were seen taking their flight high in the air, to the north, as if making for some river or lake they were accustomed to feed at. At the Frome river, where it spreads into the plains to the north of Flinders range; four white cockatoos were found flying about among the trees, although those birds had not been met with for 200 miles before I attained that point. [Note 36: Vide Vol. I. July 4, Aug 31, and March 19.] And about longitude 128 degrees 20 minutes E., when crossing over towards King George's Sound, large parrots were found coming from the north-east, to feed upon the berries of a shrub growing on the sea coast, although no parrots were seen for two or three hundred miles on either side, either to the east or to the west, they must, therefore, have come from the interior. Now the parrot is a bird that often frequents a mountainous country, and always inhabits one having timber of a better description and larger growth than the miserable shrubs met with along the coast; it is a bird too that always lives within reach of permanent fresh-water, as rivers, lakes, creeks, pools, etc. Can there then be such in the interior, with so barren and arid a region, bounding it? and how are we to commence an examination with so many difficulties and embarrassments attending the very outset?
The second series of facts which have attracted my attention, relate to the Aborigines. It is a well known circumstance that the dialects, customs, and pursuits in use among them in the various parts of the continent, differ very much from each other in some particulars, and yet that there is such a general similarity in the aggregate as to leave no room to doubt that all the Aborigines of Australia have had one common origin, and are in reality one and the same race. If this then is really the case, they must formerly have spread over the continent from one first point, and this brings me to the
Third reason I have mentioned as being one, from which I infer, that there is not an inland sea, viz., the coincidence observable in the physical appearance, customs, character, and pursuits of the Aborigines, at opposite points of the continent, whilst no such coincidence exists along the intervening lines of coast connecting those two points, and which naturally follows from the circumstances connected with the present location of the various tribes in which this is observable, and with the route which they must have taken to arrive at the places they now occupy on the continent. [Note 37 at end of para.] I believe that the idea of attempting to deduce the character of the continent, and the most probable line for crossing it, from the circumstances and habits of the natives inhabiting the coast line is quite a novel one. It appears to me, however, to be worth consideration; and if it is true that the natives have all one common origin, and have spread over the continent from one first point, I think it may reasonably be inferred that there is a practicable route across the centre of New Holland, and that this line lies between the 125th and 135th degrees of east longitude. It further appears that there must still be a second route, other than the coast line, in the direction between Port Jackson in New South Wales and the south-east corner of the Gulf of Carpentaria on the north coast.