[* This length was founded on the supposition, that sound travels at the rate of 1142 feet in a second of time, and that 6060 feet make a geographic mile. A base of 15' 24" of latitude was afterwards obtained from observations in an artificial horizon, and of 25' 17" of longitude from the time keepers with new rates, both correct, as I believe, to a few seconds. From this long base and theodolite bearings, the first base appeared to be somewhat too short; for they gave it 8.22 instead of 8.01 miles. The length of the pendulum in the first measurement was such as to swing half seconds in England; and I had not thought it, in this case, worth attention, that by the laws of gravity and the oblate spheroid, the pendulum would not swing so quick in the latitude of 35°. I must leave it to better mathematicians to determine from the data and the true length of a geographic mile in this latitude, whether the base ought to have been 8.22 as given by the observations and bearings: it was proved to be sufficiently near for all the purposes of a common nautical survey.]
Amongst the various excursions made by the scientific gentlemen, one was directed to Sleaford Mere, of which they made the circuit. The two southern branches were found to terminate within a hundred yards of the head of Sleaford Bay, with which the mere had been suspected to have a communication from its water being not quite fresh; but they are separated by a stony bank too high for the surf ever to pass over it. At the head of the bay a boat's sail and yard were seen floating, and no doubt had belonged to our unfortunate cutter: after being set out to sea by the tide, it had been driven up there by the late south-east winds.
WEDNESDAY 3 MARCH 1802
The refitment of the ship being nearly completed on the 3rd of March, lieutenant Fowler was sent round to Memory Cove in a boat, to make a final search along the shores and round the islands in Thorny Passage for the bodies of our late shipmates, which the sea might have thrown up. On the 4th [THURSDAY 4 MARCH 1802] the last turn of water was received, and completed our stock up to sixty tons; and the removal of our establishment from the shore waited only for the observation of a solar eclipse, announced in the nautical ephemeris for this day. The morning was cloudy, with rain; but towards noon the weather cleared up, and I had the satisfaction to observe the eclipse with a refracting telescope of forty-six inches focus, and a power of about two hundred. The beginning took place at 1h 12' 37.8" of apparent time, and the end at 3h 36' 11.8". So soon as the observation was concluded, the tents and astronomical instruments were carried on board, the launch was hoisted in, and everything prepared for going down the port on the following morning.
Many straggling bark huts, similar to those on other parts of the coast were seen upon the shores of Port Lincoln, and the paths near our tents had been long and deeply trodden; but neither in my excursions nor in those of the botanists had any of the natives been discovered. This morning, however, three or four were heard calling to a boat, as was supposed, which had just landed; but they presently walked away, or perhaps retired into the wood to observe our movements. No attempt was made to follow them, for I had always found the natives of this country to avoid those who seemed anxious for communication; whereas, when left entirely alone, they would usually come down after having watched us for a few days. Nor does this conduct seem to be unnatural; for what, in such case, would be the conduct of any people, ourselves for instance, were we living in a state of nature, frequently at war with our neighbours, and ignorant of the existence of any other nation? On the arrival of strangers, so different in complexion and appearance to ourselves, having power to transport themselves over, and even living upon an element which to us was impassable, the first sensation would probably be terror, and the first movement flight. We should watch these extraordinary people from our retreats in the woods and rocks, and if we found ourselves sought and pursued by them, should conclude their designs to be inimical; but if, on the contrary, we saw them quietly employed in occupations which had no reference to us, curiosity would get the better of fear; and after observing them more closely, we should ourselves seek a communication. Such seemed to have been the conduct of these Australians; and I am persuaded that their appearance on the morning when the tents were struck was a prelude to their coming down, and that had we remained a few days longer, a friendly communication would have ensued. The way was, however, prepared for the next ship which may enter this port, as it was to us in King George's Sound by captain Vancouver and the ship Elligood, to whose previous visits and peaceable conduct we were most probably indebted for our early intercourse with the inhabitants of that place. So far as could be perceived with a glass, the natives of this port were the same in personal appearance as those of King George's Sound and Port Jackson. In the hope of conciliating their good will to succeeding 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 kangaroos 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 super-stratum 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.
Port Lincoln is certainly a fine harbour; and it is much to be regretted that it possesses no constant run of fresh water, unless it should be in Spalding Cove, which we did not examine. Our pits at the head of the port will, however, supply ships at all times; and though discoloured by whitish clay, the water has no pernicious quality, nor is it ill tasted. This and wood, which was easily procured, were all that we found of use to ships; and for the establishment of a colony, which the excellence of the port might seem to invite, the little fertility of the soil offers no inducement. The wood consists principally of the eucalyptus and casuarina.
Of the climate we had no reason to speak but in praise; nor were we incommoded by noxious insects. The range of the thermometer on board the ship was from 66° to 78° and that of the barometer from 29.4 to 30.20 inches. The weather was generally clouded, the winds light, coming from the eastward in the mornings and southward after noon. On shore the average height of the thermometer at noon was 76°.
The latitude of our tents at the head of Port Lincoln, from the mean of four meridian observations of the sun taken from an artificial horizon, was 34° 48' 25" S.