Large fires were frequently seen in this season upon some of the hills, and we had been much at a loss to know for what purpose they were so frequently lighted, at this time of the year; but in going down the harbour one day, with an intention to get upon the North Head, for the purpose of ascertaining its exact latitude, we observed on a hill near that point, one of those large fires, which (with the first lieutenant and surgeon who were with me) we determined to visit; and as we thought it might probably be some funeral ceremony, which we were very desirous of seeing, we took our guns, and intended getting up amongst them unperceived; but when we arrived at the place, to our very great disappointment, not a person was to be seen: I believe there were not less than three or four acres of ground all in a blaze; we then conjectured that these fires were made for the purpose of clearing the ground of the shrubs and underwood, by which means they might with greater ease get at those roots which appear to be a great part of their subsistence during the winter. We had observed that they generally took the advantage of windy weather for making such fires, which would of course occasion their spreading over a greater extent of ground. On the 14th of July four transports, under the command of Lieutenant Shortland, sailed for England; they intended going to the northward, and passing through the streights of Macassar and Sunda, the season being too early either to attempt going round Van Diemen's land, and to endeavour to get to the westward by that tract, or to go to the eastward by Cape Horn. The 12th of August being the birth-day of His Royal Highness the Prince of Wales, a salute of 21 guns was fired from the Sirius and Supply, and the officers of the settlement and ships dined with the governor, as on His Majesty's birth-day. We began at this time to take equal altitudes for ascertaining the exact rate of the time-keeper. On the 17th, the governor directed two boats from the Sirius, with a proper officer in each, to go up the harbour; one to take the north, the other the south side; they were to enter every cove in their way up, in order to ascertain, as exactly as possible, the number of canoes and natives within the harbour of Port Jackson; for the same purpose, two other boats went down the harbour; in one of which the governor went, and I proceeded in the other; in the lower or north part of the harbour there was a considerable number of canoes, some of which were then employed in catching fish.