CONCLUDING REMARKS.

To most of my readers, the foregoing narrative will appear little else than a succession of adventures. Whilst the expedition was toiling down the rivers, no rich country opened upon the view to reward or to cheer the perseverance of those who composed it, and when, at length, the land of promise lay smiling before them, their strength and their means were too much exhausted to allow of their commencing an examination, of the result of which there could be but little doubt. The expedition returned to Sydney, without any splendid discovery to gild its proceedings; and the labours and dangers it had encountered were considered as nothing more than ordinary occurrences. If I myself had entertained hopes that my researches would have benefited the colony, I was wholly disappointed.

There is a barren tract of country lying to the westward of the Blue Mountains that will ever divide the eastern coast from the more central parts of Australia, as completely as if seas actually rolled between them.

GEOGRAPHICAL REMARKS.

In a geographical point of view, however, nothing could have been more satisfactory, excepting an absolute knowledge of the country to the northward between the Murray and the Darling, than the results of the expedition. I have in its proper place stated, as fairly as I could, my reasons for supposing the princ.i.p.al junction (which I consequently left without a name) to be the Darling of my former journey, as well as the various arguments that bore against such a conclusion.

Of course, where there is so much room for doubt, opinions will be various. I shall merely review the subject, in order to connect subsequent events with my previous observations, and to give the reader a full idea of that which struck me to be the case on a close and anxious investigation of the country from mountain to lowland. I returned from the Macquarie with doubts on my mind as to the ultimate direction to which the waters of the Darling river might ultimately flow; for, with regard to every other point, the question was, I considered, wholly decided. But, with regard to that singular stream, I was, from the little knowledge I had obtained, puzzled as to its actual course; and I thought it as likely that it might turn into the heart of the interior, as that it would make to the south. It had not, however, escaped my notice, that the northern rivers turned more abruptly southward (after gaining a certain distance from the base of the ranges) than the more southern streams: near the junction of the Castlereagh with the Darling especially, the number of large creeks joining the first river from the north, led me to conclude that there was at that particular spot a rapid fall of country to the south.

The first thing that strengthened in my mind this half-formed opinion, was the fall of the Lachlan into the Morumbidgee. I had been told that Australia was a basin; that an unbroken range of hills lined its coasts, the internal rivers of which fell into its centre, and contributed to the formation of an inland sea; I was not therefore prepared to find a break in the chain--a gap as it were for the escape of these waters to the coast.

Subsequently to our entrance into the Murray, the remarkable efforts of that river to maintain a southerly course were observed even by the men, and the singular runs it made to the south, when unchecked by high lands, clearly evinced its natural tendency to flow in that direction.

Had we found ourselves at an elevation above the bed of the Darling when we reached the junction of the princ.i.p.al tributary with the Murray, I should still have had doubts on my mind as to the ident.i.ty of that tributary with the first-mentioned river; but considering the trifling elevation of the Darling above the sea, and that the junction was still less elevated above it, I cannot bring myself to believe that the former alters its course. It is not, however, on this simple geographical principle that I have built my conclusions; other corroborative circ.u.mstances have tended also to confirm in my mind the opinion I have already given, not only of the comparatively recent appearance above the ocean of the level country over which I had pa.s.sed, but that the true dip of the interior is from north to south.

In support of the first of these conclusions, it would appear that a current of water must have swept the vast acc.u.mulation of sh.e.l.ls, forming the great fossil bank through which the Murray pa.s.ses from the northern extremity of the continent, to deposit them where they are; and it would further appear from the gradual rise of this bed, on an inclined plain from N.N.E. to S.S.W., that it must in the first instance, have swept along the base of the ranges, but ultimately turned into the above direction by the convexity of the mountains at the S.E. angle of the coast. From the circ.u.mstance, moreover, of the summit of the fossil formation being in places covered with oyster sh.e.l.ls, the fact of the whole ma.s.s having been under water is indisputable, and leads us naturally to the conclusion that the depressed interior beyond it must have been under water at the same time.

It was proved by barometrical admeasurement, that the cataract of the Macquarie was 680 feet above the level of the sea, and, in like manner, it was found that the depot of Mr. Oxley, on the Lachlan, was only 500, there being a still greater fall of country beyond these two points.

The maximum height of the fossil bank was 300 feet; and if we suppose a line to be drawn from its top to the eastward, that line would pa.s.s over the marshes of the two rivers, and would cut them at a point below which they both gradually diminish. Hence I am brought to conclude that in former times the sea washed the western base of the dividing ranges, at or near the two points whose respective elevations I have given; and that when the ma.s.s of land now lying waste and unproductive, became exposed, the rivers, which until then had pursued a regular course to the ocean, having no channel beyond their original termination, overflowed the almost level country into which they now fall; or, filling some extensive concavity, have contributed, by successive depositions, to the formation of those marshes of which so much has been said. I regret extremely, that my defective vision prevents me giving a slight sketch to elucidate whet I fear I have, in words, perhaps, failed in making sufficiently intelligible.

GEOLOGICAL REMARKS.

Now, as we know not by what means the changes that have taken place on the earth's surface have been effected, and can only reason on them from a.n.a.logy, it is to be feared we shall never arrive at any clear demonstration of the truth of our surmises with regard to geographical changes, whether extensive or local, since the causes which produced them will necessarily have ceased to operate. We cannot refer to the dates when they took place, as we may do in regard to the eruptions of a volcano, or the appearance or disappearance of an island. Such events are of minor importance. Those mighty changes to which I would be understood to allude, can hardly be laid to the account of chemical agency. We can easily comprehend how subterranean fires will occasionally burst forth, and can thus satisfactorily account for earthquake or volcano; but it is not to any clashing of properties, or to any visible causes, that the changes of which I speak can be attributed. They appear rather as the consequences of direct agency, of an invisible power, not as the occasional and fretful workings of nature herself. The marks of that awful catastrophe which so nearly extinguished the human race, are every day becoming more and more visible as geological research proceeds. Thus, in the limestone caves at Wellington Valley, the remains of fossils and exuviae, show that their depths were penetrated by the same searching element that poured into the caverns of Kirkdale and other places. They are as gleams of sunshine falling upon the pages of that sublime and splendid volume, in which the history of the deluge is alone to be found; as if the Almighty intended that His word should stand single and unsupported before mankind: and when we consider that such corroborative testimonies of his wrath, as those I have noticed, were in all probability wholly unknown to those who wrote that sacred book, the discovery of the remains of a past world, must strike those under whose knowledge it may fall with the truth of that awful event, which language has vainly endeavoured to describe and painters to represent.

CHAPTER VIII.

Environs of the lake Alexandrina--Appointment of Capt. Barker to make a further survey of the coast near Encounter Bay--Narrative of his proceedings--Mount Lofty, Mount Barker, and beautiful country adjacent-- Australian salmon--Survey of the coast--Outlet of lake to the sea-- Circ.u.mstances that led to the slaughter of Capt. Barker by the natives-- His character--Features of this part of the country and capabilities of its coasts--Its adaptation for colonization--Suggestions for the furtherance of future Expeditions.

ENVIRONS OF THE LAKE ALEXANDRINA.

The foregoing narrative will have given the reader some idea of the state in which the last expedition reached the bottom of that extensive and magnificent basin which receives the waters of the Murray. The men were, indeed, so exhausted, in strength, and their provisions so much reduced by the time they gained the coast, that I doubted much, whether either would hold out to such place as we might hope for relief. Yet, reduced as the whole of us were from previous exertion, beset as our homeward path was by difficulty and danger, and involved as our eventual safety was in obscurity and doubt, I could not but deplore the necessity that obliged me to re-cross the Lake Alexandrina (as I had named it in honour of the heir apparent to the British crown), and to relinquish the examination of its western sh.o.r.es. We were borne over its ruffled and agitated surface with such rapidity, that I had scarcely time to view it as we pa.s.sed; but, cursory as my glance was, I could not but think I was leaving behind me the fullest reward of our toil, in a country that would ultimately render our discoveries valuable, and benefit the colony for whose interests we were engaged. Hurried, I would repeat, as my view of it was, my eye never fell on a country of more promising aspect, or of more favourable position, than that which occupies the s.p.a.ce between the lake and the ranges of St. Vincent's Gulf, and, continuing northerly from Mount Barker, stretches away, without any visible boundary.

It appeared to me that, unless nature had deviated from her usual laws, this tract of country could not but be fertile, situated as it was to receive the mountain deposits on the one hand, and those of the lake upon the other.

FURTHER EXAMINATION OF THE COAST.

In my report to the Colonial Government, however, I did not feel myself justified in stating, to their full extent, opinions that were founded on probability and conjecture alone. But, although I was guarded in this particular, I strongly recommended a further examination of the coast, from the most eastern point of Encounter Bay, to the head St. Vincent's Gulf, to ascertain if any other than the known channel existed among the sand-hills of the former, or if, as I had every reason to hope from the great extent of water to the N.W., there was a practicable communication with the lake from the other; and I ventured to predict, that a closer survey of the interjacent country, would be attended with the most beneficial results; nor have I a doubt that the promontory of Cape Jervis would ere this have been settled, had Captain Barker lived to complete his official reports.

CAPT. BARKER'S SURVEY.

The governor, General Darling, whose multifarious duties might well have excused him from paying attention to distant objects, hesitated not a moment when he thought the interests of the colony, whose welfare he so zealously promoted, appeared to be concerned; and he determined to avail himself of the services of Captain Collet Barker, of the 39th regiment, who was about to be recalled from King George's Sound, in order to satisfy himself as to the correctness of my views.

Captain Barker had not long before been removed from Port Raffles, on the northern coast, where he had had much intercourse with the natives, and had frequently trusted himself wholly in their hands. It was not, however, merely on account of his conciliating manners, and knowledge of the temper and habits of the natives, that he was particularly fitted for the duty upon which it was the governor's pleasure to employ him. He was, in addition, a man of great energy of character, and of much and various information.

Orders having reached Sydney, directing the establishment belonging to New South Wales to be withdrawn, prior to the occupation of King George's Sound by the government of Western Australia, the ISABELLA schooner was sent to receive the troops and prisoners on board; and Captain Barker was directed, as soon as he should have handed over the settlement to Captain Stirling, to proceed to Cape Jervis, from which point it was thought he could best carry on a survey not only of the coast but also of the interior.

This excellent and zealous officer sailed from King George's Sound, on the 10th of April, 1831, and arrived off Cape Jervis on the 13th. He was attended by Doctor Davies, one of the a.s.sistant surgeons of his regiment, and by Mr. Kent, of the Commissariat. It is to the latter gentleman that the public are indebted for the greater part of the following details; he having attended Captain Barker closely during the whole of this short but disastrous excursion, and made notes as copious as they are interesting. At the time the ISABELLA arrived off Cape Jervis, the weather was clear and favourable. Captain Barker consequently stood into St. Vincent's Gulf, keeping, as near as practicable, to the eastern sh.o.r.e, in soundings that varied from six to ten fathoms, upon sand and mud.

His immediate object was to ascertain if there was any communication with the lake Alexandrina from the gulf. He ascended to lat. 34 degrees 40 minutes where he fully satisfied himself that no channel did exist between them. He found, however, that the ranges behind Cape Jervis terminated abruptly at Mount Lofty, in lat. 34 degrees 56 minutes, and, that a flat and wooded country succeeded to the N. and N.E. The sh.o.r.e of the gulf tended more to the N.N.W., and mud flats and mangrove swamps prevailed along it.

INVITING COUNTRY--MOUNT LOFTY.

Mr. Kent informs me, that they landed for the first time on the 15th, but that they returned almost immediately to the vessel. On the 17th, Captain Barker again landed, with the intention of remaining on sh.o.r.e for two or three days. He was accompanied by Mr. Kent, his servant Mills, and two soldiers. The boat went to the place at which they had before landed, as they thought they had discovered a small river with a bar entrance. They crossed the bar, and ascertained that it was a narrow inlet, of four miles in length, that terminated at the base of the ranges. The party were quite delighted with the aspect of the country on either side of the inlet, and with the bold and romantic scenery behind them. The former bore the appearance of natural meadows, lightly timbered, and covered with a variety of gra.s.ses. The soil was observed to be a rich, fat, chocolate coloured earth, probably the decomposition of the deep blue limestone, that showed itself along the coast hereabouts. On the other hand, a rocky glen made a cleft in the ranges at the head of the inlet; and they were supplied with abundance of fresh water which remained in the deeper pools that had been filled by the torrents during late rains. The whole neighbourhood was so inviting that the party slept at the head of the inlet.

MOUNT LOFTY AND ITS ENVIRONS.

In the morning, Captain Barker proceeded to ascend Mount Lofty, accompanied by Mr. Kent and his servant, leaving the two soldiers at the bivouac, at which he directed them to remain until his return. Mr. Kent says they kept the ridge all the way, and rose above the sea by a gradual ascent. The rock-formation of the lower ranges appeared to be an argillaceous schist; the sides and summit of the ranges were covered with verdure, and the trees upon them were of more than ordinary size. The view to the eastward was shut out by other ranges, parallel to those on which they were; below them to the westward, the same pleasing kind of country that flanked the inlet still continued.

MOUNT BARKER.

In the course of the day they pa.s.sed round the head of a deep ravine, whose smooth and gra.s.sy sides presented a beautiful appearance. The party stood 600 feet above the bed of a small rivulet that occupied the bottom of the ravine. In some places huge blocks of granite interrupted its course, in others the waters had worn the rock smooth. The polish of these rocks was quite beautiful, and the veins of red and white quartz which traversed them, looked like mosaic work. They did not gain the top of Mount Lofty, but slept a few miles beyond the ravine. In the morning they continued their journey, and, crossing Mount Lofty, descended northerly, to a point from which the range bent away a little to the N.N.E., and then terminated. The view from this point was much more extensive than that from Mount Lofty itself. They overlooked a great part of the gulf, and could distinctly see the mountains at the head of it to the N.N.W. To the N.W. there was a considerable indentation in the coast, which had escaped Captain Barker's notice when examining it. A mountain, very similar to Mount Lofty, bore due east of them, and appeared to be the termination of its range. They were separated by a valley of about ten miles in width, the appearance of which was not favourable. Mr. Kent states to me, that Capt. Barker observed at the time that he thought it probable I had mistaken this hill for Mount Lofty, since it shut out the view of the lake from him, and therefore he naturally concluded, I could not have seen Mount Lofty. I can readily imagine such an error to have been made by me, more especially as I remember that at the time I was taking bearings in the lake, I thought Captain Flinders had not given Mount Lofty, as I then conceived it to be, its proper position in longitude. Both hills are in the same parallel of lat.i.tude. The mistake on my part is obvious. I have corrected it in the charts, and have availed myself of the opportunity thus afforded me of perpetuating, as far as I can, the name of an inestimable companion in Captain Barker himself.

Immediately below the point on which they stood, Mr. Kent says, a low undulating country extended to the northward, as far as he could see.

It was partly open, and partly wooded; and was every where covered with verdure. It continued round to the eastward, and apparently ran down southerly, at the opposite base of the mount Barker Range. I think there can be but little doubt that my view from the S.E., that is, from the lake, extended over the same or a part of the same country. Captain Barker again slept on the summit of the range, near a large basin that looked like the mouth of a crater, in which huge fragments of rocks made a scene of the utmost confusion. These rocks were a coa.r.s.e grey granite, of which the higher parts and northern termination of the Mount Lofty range are evidently formed; for Mr. Kent remarks that it superseded the schistose formation at the ravine we have noticed--and that, subsequently, the sides of the hills became more broken, and valleys, or gullies, more properly speaking, very numerous. Captain Barker estimated the height of Mount Lofty above the sea at 2,400 feet, and the distance of its summit from the coast at eleven miles. Mr. Kent says they were surprised at the size of the trees on the immediate brow of it; they measured one and found it to be 43 feet in girth. Indeed, he adds, vegetation did not appear to have suffered either from its elevated position, or from any prevailing wind.

Eucalypti were the general timber on the ranges; one species of which, resembling strongly the black b.u.t.ted-gum, was remarkable for a scent peculiar to its bark.

AUSTRALIAN SALMON.

The party rejoined the soldiers on the 21st, and enjoyed the supply of fish which they had provided for them. The soldiers had amused themselves by fishing during Captain Barker's absence, and had been abundantly successful. Among others they had taken a kind of salmon, which, though inferior in size, resembled in shape, in taste, and in the colour of its flesh, the salmon of Europe. I fancied that a fish which I observed with extremely glittering scales, in the mouth of a seal, when myself on the coast, must have been of this kind; and I have no doubt that the lake is periodically visited by salmon, and that these fish retain their habits of entering fresh water at particular seasons, also in the southern hemisphere.

Immediately behind Cape Jervis, there is a small bay, in which according to the information of the sealers who frequent Kangaroo Island, there is good and safe anchorage for seven months in the year, that is to say, during the prevalence of the E. and N.E. winds.

SURVEY OF THE COAST.

Captain Barker landed on the 21st on this rocky point at the northern extremity of this bay. He had, however, previously to this, examined the indentation in the coast which he had observed from Mount Lofty, and had ascertained that it was nothing more than an inlet; a spit of sand, projecting from the sh.o.r.e at right angles with it, concealed the month of the inlet. They took the boat to examine this point, and carried six fathoms soundings round the head of the spit to the mouth of the inlet, when it shoaled to two fathoms, and the landing was observed to be bad, by reason of mangrove swamps on either side of it. Mr. Kent, I think, told me that this inlet was from ten to twelve miles long. Can it be that a current setting out of it at times, has thrown up the sand-bank that protects its mouth, and that trees, or any other obstacle, have hidden its further prolongation from Captain Barker's notice? I have little hope that such is the case, but the remark is not an idle one.

BEAUTIFUL VALLEYS.

Between this inlet and the one formerly mentioned, a small and clear stream was discovered, to which Captain Barker kindly gave my name. On landing, the party, which consisted of the same persons as the former one, found themselves in a valley, which opened direct upon the bay. It was confined to the north from the chief range by a lateral ridge, that gradually declined towards and terminated at, the rocky point on which they had landed. The other side of the valley was formed of a continuation of the main range, which also gradually declined to the south, and appeared to be connected with the hills at the extremity of the cape.

The valley was from nine to ten miles in length, and from three to four in breadth. In crossing it, they ascertained that the lagoon from which the schooner had obtained a supply of water, was filled by a watercourse that came down its centre. The soil in the valley was rich, but stony in some parts. There was an abundance of pasture over the whole, from amongst which they started numerous kangaroos. The scenery towards the ranges was beautiful and romantic, and the general appearance of the country such as to delight the whole party.

Preserving a due east course, Captain Barker pa.s.sed over the opposite range of hills, and descended almost immediately into a second valley that continued to the southwards. Its soil was poor and stony, and it was covered with low scrub. Crossing it, they ascended the opposite range, from the summit of which they had a view of Encounter Bay. An extensive flat stretched from beneath them to the eastward, and was backed, in the distance, by sand hummocks, and low wooded hills. The extreme right of the flat rested upon the coast, at a rocky point near which there were two or three islands. From the left a beautiful valley opened upon it. A strong and clear rivulet from this valley traversed the flat obliquely, and fell into the sea at the rocky point, or a little to the southward of it.

The hills forming the opposite side of the valley had already terminated.

Captain Barker, therefore, ascended to higher ground, and, at length, obtained a view of the Lake Alexandrina, and the channel of its communication with the sea to the N.E. He now descended to the flat, and frequently expressed his anxious wish to Mr. Kent that I had been one of their number to enjoy the beauty of the scenery around them, and to partic.i.p.ate in their labours. Had fate so ordained it, it is possible the melancholy tragedy that soon after occurred might have been averted.

OUTLET OF LAKE TO THE SEA.

At the termination of the flat they found themselves upon the banks of the channel, and close to the sand hillock under which my tents had been pitched. From this point they proceeded along the line of sand-hills to the outlet; from which it would appear that Kangaroo Island is not visible, but that the distant point which I mistook for it was the S.E.

angle of Cape Jervis. I have remarked, in describing that part of the coast, that there is a sand-hill to the eastward of the inlet, under which the tide runs strong, and the water is deep. Captain Barker judged the breadth of the channel to be a quarter of a mile, and he expressed a desire to swim across it to the sand-hill to take bearings, and to ascertain the nature of the strand beyond it to the eastward.

It unfortunately happened, that he was the only one of the party who could swim well, in consequence of which his people remonstrated with him on the danger of making the attempt unattended. Notwithstanding, however, that he was seriously indisposed, he stripped, and after Mr. Kent had fastened his compa.s.s on his head for him, he plunged into the water, and with difficulty gained the opposite side; to effect which took him nine minutes and fifty-eight seconds. His anxious comrades saw him ascend the hillock, and take several bearings; he then descended the farther side, and was never seen by them again.