It was now evident that we had entered the most thickly-populated district of Australia that I had yet observed, and moreover one which must have been inhabited for a long series of years, for more had here been done to secure a provision from the ground by hard manual labour than I could have believed it in the power of uncivilised man to accomplish. After crossing a low limestone range we came down upon another equally fertile warran ground, bounded eastward by a high range of rocky limestone hills, luxuriantly grassed, and westward by a low range of similar formation. The native path about two miles further on crossed this latter range, and we found ourselves in a grassy valley, about four miles wide, bounded seawards by sandy downs. Along its centre lay a chain of reedy freshwater swamps, and native paths ran in from all quarters to one main line of communication leading to the southward. DANGERS OF DELAY. In these swamps we first found the yunjid, or flag (a species of typha) and the sow-thistle of the southern districts; one we came to was a thick tea-tree swamp, extremely picturesque, and producing abundance of these plants, some of which were collected by the men to eat in the evening. To my surprise Mr. Walker here came up to me and asked if I did not think it would be better to halt for a day or two at places of this kind to allow the men to refresh themselves. The idea of men halting and wasting their strength and energies in searching for native food whilst they had so fearful a journey before them, and no supplies, appeared to me to be preposterous in the extreme: to obtain a sufficiency of food, even for a native, requires in Australia a great degree of skill and knowledge of the productions of the country; but for a European, utterly unaccustomed to this species of labour and totally unacquainted with the productions of the land, to obtain enough to support life for any period, whilst at the same time he has to search for water, is quite impossible. Even Kaiber, from his ignorance of the roots, declared that he should starve in this country. I saw therefore that did I adopt the proposed plan of travelling only a few miles a day, and occasionally halting for a day or two to refresh ourselves upon some thistles and periwinkles, I should infallibly sacrifice the lives of the whole party; and under this impression I declined to accede to the suggestion. Amongst indolent and worn-out men however it subsequently became an extremely popular notion, and, as future events clearly showed, a fatally erroneous one. I from the first opposed it both by my words and example; and in this instance, as soon as I conceived that the men were sufficiently rested, I moved on. PICTURESQUE ESTUARY.