After travelling six hours, we encamped beside a small watercourse near Mussel Brook, the thermometer at four P.M. being as high as 95 degrees. In the evening, the burning grass became rather alarming, especially as we had a small stock of ammunition in one of the carts. I had established our camp to the windward of the burning grass, but I soon discovered that the progress of the fire was against the wind, especially where the grass was highest. This may appear strange, but it is easily accounted for. The extremities of the stalks bending from the wind, are the first to catch the flame, but as they become successively ignited, the fire runs directly to the windward, which is toward the lower end of the spikes of grass, and catching the extremities of other stalks still further in the direction of the wind, it travels in a similar manner along them. We managed to extinguish the burning grass before it reached our encampment, but to prevent the invasion of such a dangerous enemy we took the precaution, on other occasions, of burning a sufficient space around our tents in situations where we were exposed to like inconvenience and danger. ABORIGINES AND COLONISTS. December 1, 6 A.M. The thermometer at 82 degrees. As the party proceeded, the sky became overcast, and the absence of the sun made the day much more agreeable. Towards noon we had rain and thunder, and this weather continued until we reached the banks of the Hunter. We forded the river where the stream was considerable at the time, and then encamped on the left bank. The draught animals appeared less fatigued by this journey, than they had been by that of the former day, owing probably to the refreshing moisture and cooler air. After the tents had been pitched, a fine invigorating breeze arose, and the weather cleared up. Segenhoe, the extensive estate of Potter Macqueen, Esquire was not far distant, and Mr. Sempill the agent, called at my tent, and afforded me some aid in completing my arrangements.