To judge from the appearance of those who had resided any length of time at Coepang, the climate is not good; for even in comparison with us, who had suffered considerably, they were sickly looking people. Yet they did not themselves consider the colony as unhealthy, probably from making their comparison with Batavia; but they spoke of Diely, the Portuguese settlement, as very bad in this respect. Captain Baudin had lost twelve men from dysentery, during his stay at Coepang, and I found a monument which he had erected to his principal gardener; but it was even then beginning to decay. The _latitude_ of our anchorage, three-fifths of a mile to the north of Fort Concordia, was 10° 8' 2" from seven meridian altitudes of the sun; but these being all taken to the north, I consider it to be more correctly, 10° 8½' S. _Longitude_ of the anchorage and fort, from fifty four sets of lunar distances, of which the particulars are given in Table VII. of the Appendix No. I., 123° 35' 46" E. Lieutenant Flinders took altitudes from the sea horizon, between April 1 p.m. and 8 a.m., for the rates of the time keepers; the mean of which, with the errors from mean Greenwich time at noon there on the last day of observation, were as under: Earnshaw's No. 543, slow 2h 57' 14.56", and losing 16.73", per day, Earnshaw's No. 520, fast 1h 57' 19.28", and losing 33.99", per day; the rate of No. 543 differing only 0.2" from that with which we had left Caledon Bay. The longitude given by this time keeper on April 1, p.m., with the Caledon rate, was 123° 39' 8.4" east, or 3' 22" more than the lunars; and when the Caledon rate is accelerated, the difference is only 2' 3½" east. This quantity, if the longitudes of Caledon and Coepang Bays be correct, is the sum of the irregularities of No. 543, during the fifty-one days between one station and the other. The time keeper No. 520 had been let down on the passage, and its rate being now more than 3" greater than at Caledon Bay, its longitude was not attended to at this time. In laying down the coasts and islands of Arnhem's Land, the bearings and observed latitudes were used, with very little reference to the time keepers; but No. 543, when corrected, did not differ so much from the survey as 1' in twenty-five days. The rest of the track, from Wessel's Islands to Coepang, is laid down by this time keeper with the accelerated rate, and the application of a proportional part of 2' 3½", its irregularity during fifty-one days. _Variation_ of the surveying compass, 0° 46' west, observed when the ship's head was E. S. E., or corrected to the meridian, 0° 37' east; but this variation seems to apply only to Coepang Bay; for about two degrees to the eastward it was 1° 4' west, corrected, and one degree to the south-west it was 1° 41' west.