from the north-west. It was a happy circumstance that we were able to reach our new discovered port, and take refuge at the former secure anchorage near the Shag Rocks; for this gale was more violent and of longer continuance than any of the preceding. This long succession of adverse winds caused us almost to despair of accomplishing the principal object of the voyage; for of the twelve weeks, to which our absence from Port Packson was limited, nearly eight were already expired.
Dec. 2. The gale moderated, and we made an attempt to continue the voyage, but were driven back. On the 3rd, the attempt was repeated; and the wind being light, we anchored at the entrance of the port, to prevent losing by the flood what had been gained by the ebb tide. In the evening a fair wind sprung up; and at length, to our great satisfaction, we were enabled to proceed in the discovery of the strait.
The harbour, which we entered with so much pleasure on Nov. 3, and finally quitted with still more on Dec. 3, was named PORT DALRYMPLE, by His Excellency governor Hunter, as a mark of respect to Alexander Dalrymple, Esq., the late hydrographer to the Admiralty. The following is a summary of the observations taken there, for fixing the position of Low Head, on the east side of the entrance:
Latitude from six meridian altitudes, of which three
were taken in port, and three at sea within sight
of Low Head 41° 3' 30" S.
Longitude from two sets of distances of the sun east,
and two west of the moon, with Troughton's nine
inch sextant No. 251, corrected for the errors of
the lunar and solar tables 146° 43' 45" E.
From two do. do. with a five-inch sextant of Adams 146° 52' 46"
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Mean from sun and moon 146° 48' 15" E.
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From one set of a star east, and one west of the moon,
with No. 251 146° 52' 34"
From two ditto, ditto, with the five-inch 146° 56' 50"
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Mean from stars and moon 146° 54' 42"
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Mean of all 146° 51' 28" E.*
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Variation of the theodolite., observed on the shore
of Outer Cove 7 28 east
Do. of the azimuth compass, observed in the same place, 8 30
Do. of the same, taken at anchor off the port, the
sloop's head being N. by E. (magnetic), 7 44
The time of high water in Port Dalrymple, is one quarter of an hour before the moon passes over the meridian; and the rise of tide is from six to eight, or it is said to ten, feet. The ebb sets out seven hours; and both ebb and flood run with much rapidity in the narrow parts, but the particular rate was not ascertained.
[* The longitude of Low-Head, deduced from the Investigator's time keepers, combined with my surveys in the Francis and Norfolk, is 146° 47½ east; as the observations with the large sextant, No. 251, taken alone, would give it very nearly.]
Port Dalrymple and the River Tamar* occupy the bottom of a valley betwixt two irregular chains of hills, which shoot off north-westward, from the great body of inland mountains. In some places, these hills stand wide apart, and the river then opens its banks to a considerable extent; in others, they nearly meet, and contract its bed to narrow limits. The Tamar has, indeed, more the appearance of a chain of lakes, than of a regularly-formed river; and such it probably was, until, by long undermining, assisted perhaps by some unusual weight of water, a communicating channel was formed, and a passage forced out to sea. From the shoals in Sea Reach, and more particularly from those at Green Island which turn the whole force of the tides, one is led to suppose, that the period when the passage to sea was forced has not been very remote. [* So named by the late lieut. colonel Paterson, who was sent from Port Jackson to settle a new colony there, in 1804. The sources of the river were then explored, and the new names applied which are given in the chart. The first town established was Yorktown at the head of the Western Arm, but this proving inconvenient as a sea port, it was proposed to be removed lower down, near Green Island. Launceston, which is intended to be the capital of the new colony, is fixed at the junction of the North and South Esks, up to which the Tamar is navigable for vessels of 150 tons. The tide reaches nine or ten miles up the North Esk, and the produce of the farms within that distance may be sent down the river by boats, but the South Esk descends from the mountains by a cataract, directly into the Tamar, and, consequently, is not accessible to navigation of any kind.]
Of the two chains of hills which bound the valley, the eastern one terminates at Low Head; the other comes down to the sea, five or six miles from it, on the west side of the port. The ends of these chains, when seen from directly off the entrance, appear as two clusters of hills having some resemblance to each other; and in fine weather, the distant blue heads of the back mountains will be seen over the tops of both clusters. These appearances, joined to the latitude and longitude, are the best distant marks for finding Port Dalrymple. If a ship come along shore from the eastward, the Ninth Island, and afterward Stony Head with the Tenth Islet lying three or four miles to the north-west, will announce the vicinity of the port; and Low Head will be perceived in the bight to the S. S. W., but it is not a conspicuous object.
Three or four leagues to the westward of the port, the back land is uncommonly high, and the top of the ridge is intersected into uncouth shapes. From the brilliancy of some of these mountains, on the appearance of the sun after rain, I judged them to be of granite, like those of Furneaux's Islands. These mountains, with the direction of the coast and what has been said of the clusters of hills, may serve as marks for Port Dalrymple to ships coming along shore from the westward.
Reefs and banks extend out to a considerable distance on the west side of the entrance; so that strangers should avoid that side, and endeavour to come in with Low Head. The greater part of these shoals, as also of those in Sea Reach, are covered at half tide; therefore the first of the flood, or even a little before, is the best time to enter Port Dalrymple, as almost the whole of the dangers are then visible. A signal post, with pilots, was fixed at Low Head on the settlement of the new colony in 1804, and beacons have since been placed on the most dangerous rocks and shoals; it has therefore become unnecessary to give particular instructions for sailing up the port, especially as they may be found in my Observations on the coasts of Van Diemen's Land, etc.; a little memoir published by Mr. Arrowsmith, in 1801.*
[* In Mr. Horsburgh's Sailing Directions, etc. Part II., are given, upon my friend captain Kent's authority, notices of the beacons laid down, and directions respecting them; to which I add, from the information of lieut. Oxley, that a rock, on which H. M. ship Porpoise struck, lies W. ½ N. by compass, one cable's length from Point Roundabout. There is no more than four feet upon it at low water, but it way be safely passed on either side.]
We found Port Dalrymple to be an excellent place for refreshment. Out of the flocks of black swans, from one-fifth to one-tenth of them were unable to fly; and since the same thing has been found to obtain in the months of January and May, as well as in October. it is probably so at all times of the year. These birds are endowed with a considerable portion
