On the twenty-fourth of March I received the instructions of his excellency the Governor to take charge of the expedition which had been fitted out for the purpose of ascertaining the course of the Lachlan River, and generally to prosecute the examination of the western interior of New South Wales. On the sixth of April I quitted Sydney, and after a pleasant journey arrived at Bathurst on the fourteenth, and found that our provisions and other necessary stores were in readiness at the depot on the Lachlan River. We were detained at Bathurst by rainy unfavourable weather until the nineteenth, when the morning proving fine, the BAT horses, with the remainder of the provisions, baggage, and instruments, were sent off, we intending to follow them the ensuing morning. Bathurst had assumed a very different appearance since I first visited it in the suite of his excellency the Governor in 1815. The industrious hand of man had been busy in improving the beautiful works of nature; a good substantial house for the superintendant had been erected, the government grounds fenced in, and the stack yards showed that the abundant produce of the last harvest had amply repaid the labour bestowed on its culture. The fine healthy appearance of the flocks and herds was a convincing proof how admirably adapted these extensive downs and thinly wooded hills are for grazing, more particularly of sheep. The mind dwelt with pleasure on the idea that at no very distant period these secluded plains would be covered with flocks bearing the richest fleeces, and contribute in no small degree to the prosperity of the eastern settlements. The soil, in the immediate neighbourhood of Bathurst, is for the first six inches of a light, black, vegetable mould, lying on a stratum of sand, about eighteen inches deep, but of a poor description, and mixed with small stones, under which is a strong clay. The surface of the hills is covered with small gravel, the soil light and sandy, with a sub-soil of clay. The low flats on the immediate borders of the river are evidently formed by washings from the hills and valleys deposited by floods, and the overflowings of the watercourses. Sunday, April 20.--Proceeded on our journey towards the Lachlan River. At two o'clock we arrived at the head of Queen Charlotte's Valley, passing through a fine open grazing country; the soil on the hills and in the vale a light clayey loam, occasionally intermixed with sand and gravel: the late rains had rendered the ground soft and boggy. The trees were small and stunted, and thinly scattered over the hills, which frequently closed in stony points on the valley. The rocks a coarse granite.