As we required another station on the west end of Bathurst Island, I arranged that we should pass the night in a small cove near its south-eastern extreme; here we found several native habitations of a totally different and very superior description to any we had hitherto seen in any part of Australia; they bore a marked resemblance to those I had seen on the South-East coast of Tierra del Fuego, which was so striking as to be remarked even by some of the boat's crew, who had belonged to the Beagle in her wanderings on that stormy coast. Stout poles from 14 to 16 feet high formed the framework of these snug huts--for so indeed they deserve to be termed--these were brought together conically at the roof; a stout thatching of dried grass completely excluded both wind and rain, and seemed to bespeak the existence of a climate at times much more severe than a latitude of 16 degrees 6 minutes south, would lead one to anticipate. The remains of small fires, a well greased bark pillow, a head ornament of seabird's feathers, together with several other trifling articles, strewn upon the floors of these wigwams, proved that they had been very recently inhabited. NATIVE RAFT. But perhaps the most interesting discovery in this bay, was a native raft, which we found near the beach, in such a position as must have required the exertions of several men to have placed it there; being heavier than either of our boats. In the construction of this raft, almost everything had been left to nature. It was framed of the dead trunk of a mangrove tree, with three distinct stems growing from one root, about 18 feet long, and 4 1/2 broad. The roots at one end closely entwined, as is the habit of the tree, formed a sufficient bulwark at the stem, while an elbow in the centre of the trunk, served the same purpose at the stern: a platform of small poles, well covered with dried grass, gave a sufficient flooring to this rude specimen of a raft. I could not survey it without allowing my thoughts to carry me away in pleasing reflections upon the gradual progress of human ingenuity by the advance of which, the same intellect that first contents itself with the mere floating of the single tree, at length shapes a forest into timbers and launches the floating fortress in triumph on the deep! RETURN TO PORT USBORNE. We were now about 40 miles in a direct line from Port Usborne, and perhaps 70 by the winding course we were obliged to follow; only two days' provisions remained, and as we were still deficient of material for the chart of this archipelago, I was reluctantly obliged to abandon the idea of attempting to reach Collier Bay. The mainland we had explored, since leaving Port Usborne, may be described as forming eight bays, varying in depth from three to eight miles, and in width from two to five; their general trend is East-South-East; many islets skirt their shores, and almost more than can be counted fill their mouths. March 26.