The following day we erected tents and commenced some repairs to the jolly-boat, which was hauled up in the usual place; the other two boats were sent to the north end of the long sandy beach on the opposite side to examine the state of the rivulet which we had noticed there last year. On their return they reported it to be still running with a plentiful stream; and although it was rather inconvenient, from the beach being exposed to the swell and surf, yet our boats made daily trips to it without any ill consequences, notwithstanding one of them was once swamped in loading; it did not however sustain any injury. Another stream of water was subsequently found on the south side, a little without the entrance of the harbour, but too brackish for the purposes of drinking; it was therefore merely used during our stay for the common purposes of washing and cooking. Whilst our people were thus employed I was assisted by Mr. Roe at the observatory. As the particulars of our observations for this and the preceding years are inserted in the Appendix it will be sufficient here merely to record the position of the observatory; it was situated on the south shore opposite the low sandy north point; and was found to be in: Latitude: 15 degrees 27 minutes 4 seconds. Longitude: 145 degrees 10 minutes 49 seconds. Variation of the compass: 5 degrees 13 3/4 minutes East. Dip of the south end of the Needle: 38 degrees. High water at full and change: at eight o'clock. July 29. On the 29th Mr. Bedwell went to Captain Cook's Turtle Reef but he was unsuccessful in his search for that animal; neither did he find any shells different from what we had previously seen; only a few clams (Chama gigas) were brought away, besides a small fish of the shark tribe (Squalus ocellatus, Linn.). At high water the reef was overflowed excepting at its north-west end where a patch of sand not larger than the boat was left dry. At low tide the key, or the ridge of rocks heaped up round the edge of the reef, was left dry and formed a barricade for the interior, which is occupied by a shallow lake of circular shape in which many small fish and some sharks were seen swimming about. It was from this reef that Captain Cook, during the repair of his ship, procured turtle for her crew; and, this being the same season, we were disappointed in not obtaining any. On the return of the boat she was placed in some danger from the number of whales, of the fin-back species, that were sporting about the surface of the water and occasionally leaping out of it and lashing the sea with their enormous fins. July 30.