ce one hour before
the moon's passage, as it had done amongst the barrier reefs; from ten to
fifteen feet seemed to be the rise by the shore, and the flood came from
the northward.

We returned on board the ship at noon; but I deferred getting under way
till next morning, on account of the wind blowing fresh, and some
business to be executed which could not be attended to whilst among the
reefs. This gave an opportunity of making further observations by the
time keepers, from which it appeared that they gave only 8' 36.3" of
longitude west from Upper Head, with the rates there found; whereas by
the survey, we had made 12' 37". The time keeper No. 520, taken alone,
gave 11' 35.8"; and when the correction, afterwards found necessary in
the Gulph of Carpentaria, is applied, the difference becomes 12' 41",
almost exactly as by survey. The previous positions of the ship amongst
the reefs, and wherever I had not any bearings of fixed points, have
therefore been deduced from this time keeper.

The _latitude_ of the anchorage, from observations to the north and
south., was 20 deg. 45' 28' S.

_Longitude_ from a chain of bearings, connected with the fixed station in
Broad Sound, 149 deg. 34' 12" E.

_Variation_ of the theodolite, observed on the north-west beach of _l2_,
7 deg. 39' east; but it differed on the north head of the island, from 7 deg. to
9 deg. 23' east, in the space of a few yards.

The variation amongst the Barrier Reefs has not been mentioned; but five
azimuths and amplitudes were taken between the 6th, p.m. and the 15th
a.m. When corrected to the meridian, the extremes were 7 deg. 53' and 7 deg. 11';
and the mean, in latitude 20 deg. 44', longitude 150 deg. 32', will be 7 deg. 30'
east.

SUNDAY 17 OCTOBER 1802

At daylight on the 17th, the breeze was moderate at E. by N., with fine
weather; and in steering northward, close to the wind, we passed three
miles to leeward of a dry bank of rocks and sand. Several of the
Cumberland Islands were in sight at noon, when our situation and the most
essential bearings were as under.

Latitude, observed to the north and south, 20 deg. 23' 56"
Longitude from bearings, 149 331/4
Island l2, station on the north end, S. 5 E.
Other isles, large and small, from thence to N. 671/2 W.
Pentecost I. (of capt. Cook), resembling a tower, S. 89 W.

No reefs were in sight, nor in steering N. N. E. and N. E. by N., cou