Having stood to the south-east till midnight, we then tacked to the westward; and at five next morning [SUNDAY 24 JANUARY 1802] bore away north for the land, the wind being then at south-by-east, and the barometer announcing by its elevation a return of foul winds. At six we steered eastward, along the same kind of shore as seen on the preceding day; but the wind coming more unfavourable, and depth diminishing to 5 fathoms soon after eight o'clock, made it necessary to stretch off to sea. The coast in latitude 32° 1' and longitude 128° 12' was three miles distant to the north. A league further on it took a more northern direction, but without much changing its aspect; it continued to be the same sandy beach, with a bank behind it of level land topped with small trees and shrubs as before described.

MONDAY 25 JANUARY 1802

The rest of the day and the whole of the 25th were taken up in beating fruitlessly against an eastern wind. Azimuths observed when the ship's head was east-by-north gave variation 6° 4'; and ten miles to the south a little eastward they gave 3° 8' west, at south-by-east; corrected 3° 2' and 2° 32', and the mean 2° 47' for the true variation, showing a decrease since the last of 1° 19' for 2° 11' of longitude.

At ten in the evening our situation was less advanced than on the morning of the 24th, when we tacked off shore; but the mercury was again descending, and during the night the wind veered to north-east, to north, and at eight in the morning [TUESDAY 26 JANUARY 1802] to west-by-north, when we steered in for the land. At ten the shore was eight or nine miles distant, and our course was north-east, nearly as it trended. The latitude at noon, from observations to the north and south, was 31° 51' 34", and longitude by timekeepers 128° 41'; the beach was distant three or four miles in the north-north-west, and the bank behind it lay two or three miles inland and was somewhat higher, but had less wood upon it than further westward. The wind was fresh at south-west, and the mercury was rising; but the haziness of the weather was such that no extremes of the land could be set.

Our course from noon was nearly east at the distance of five or six miles from the shore; and we ran at the rate of between seven and eight knots, under double-reefed top-sails and foresail. Abreast of our situation at half-past two the level bank again closed in upon the shore, and formed cliffs very similar to those along which we had before run thirty leagues. Their elevation appeared to be from four to six hundred feet, the upper part was brown, and the lower two-thirds white; but as we advanced, the upper brown stratum was observed to augment in proportional quantity. We could not distinguish, as before, the smaller layers in the two strata; and from the number of excavations in the white part, apparently from pieces having fallen down (see Mr. Westall's sketch, Atlas, Plate XVII. View 6.), I was led to think the lower portion of these cliffs to be grit stone rather than calcareous rock. The bank was not covered with shrubs, as before it came to the water side, but was nearly destitute of vegetation, and almost as level as the horizon of the sea.

At dusk we hauled up south-east-by-south to the wind, at one in the morning [WEDNESDAY 27 JANUARY 1802] tacked to the westward, and at four bore away north for the land. Having reached within six miles of the cliffs, we steered eastward again, with a fair breeze; and at noon were in latitude 31° 40' 52' and longitude 130° 59'; the cliffs were then distant seven miles to the northward, and at N. 9° E. was their termination.

The length of these cliffs, from their second commencement, is thirty-three leagues; and that of the level bank, from near Cape Pasley where it was first seen from the sea, is no less than one hundred and forty-five leagues. The height of this extraordinary bank is nearly the same throughout, being no where less, by estimation, than four hundred, nor any where more than six hundred feet. In the first twenty leagues the ragged tops of some inland mountains were visible over it; but during the remainder of its long course the bank was the limit of our view.

This equality of elevation for so great an extent, and the evidently calcareous nature of the bank, at least in the upper two hundred feet, would bespeak it to have been the exterior line of a vast coral reef, which is always more elevated than the interior parts, and commonly level with high-water mark. From the gradual subsiding of the sea, or perhaps by a sudden convulsion of nature, this bank may have attained its present height above the surface; and however extraordinary such a change may appear, yet, when it is recollected that branches of coral still exist upon Bald Head, at the elevation of four hundred or more feet, this supposition assumes a great degree of probability; and it would further seem that the subsiding of the waters has not been at a period very remote, since these frail branches have yet neither been all beaten down nor mouldered away by the wind and weather.

If this supposition be well founded, it may, with the fact of no hill or other object having been perceived above the bank in the greater part of its course, assist in forming some conjecture of what may be within it; which cannot, as I judge in such case, be other than flat, sandy plains, or water. The bank may even be a narrow barrier between an interior and the exterior sea, and much do I regret the not having formed an idea of this probability at the time; for notwithstanding the great difficulty and risk, I should certainly have attempted a landing upon some part of the coast to ascertain a fact of so much importance.

At the termination of the bank and of the second range of cliffs the coast became sandy, and trended north-eastward about three leagues; after which it turned south-east-by-east, and formed the head of the Great Australian Bight, whose latitude I make to be 31° 29' south, and longitude 131° 10' east. In the chart of admiral D'Entrecasteaux the head of the Great Bight is placed in 31° 36' and 131° 27'; but I think there is an error at least in the latitude, for the admiral says, "At daybreak I steered to get in with the land; and the wind having returned to south-east, we hauled our starbord tacks on board, being then four or five leagues from the coast. At eleven o'clock the land was seen ahead and we veered ship in 32 fathoms, fine sand."* The latitude observed at noon, as appears by the route table, was 31° 38' 58"; and if we suppose the ship, lying up south-south-west, to have made 2' of southing in the hour, as marked in the chart, she must have been in 31° 37' at eleven o'clock; which is within one mile of the latitude assigned to the head of the bight, where the shore curves to the south-east-by-east. This does not accord with the land being only then seen ahead, since the weather appears to have admitted the sight of it at the distance of four or five leagues. If we suppose the admiral, when he veered, to have been eight, instead of one mile from the head of the Great Bight, and the account strongly favours the supposition, it will then agree with my latitude. I had only 27 fathoms in crossing the head, and although it is possible there may be 30 closer in, yet in such a place as this the probability is, that the ship having the greatest depth of water was the furthest from the land.