March 10.--We had slight drizzling showers towards sunset; the night very cloudy till about ten a.m., when it cleared up. The variety of grasses is very great; the most remarkable and succulent were two species of Anthistiria, the grass of the Isaacs, and a new one with articulate ears and rounded glumes. A pink Convolvulus, with showy blossoms, is very common. Portulaca, with terete leaves, grows sparingly on the mild rich soil. Were a superficial observer suddenly transported from one of the reedy ponds of Europe to this water-hole in Suttor Creek, he would not be able to detect the change of his locality, except by the presence of Casuarinas and the white trunks of the majestic flooded-gum. Reeds, similar to those of Europe, and Polygonums almost identical as to species, surround the water, the surface of which is covered with the broad leaves of Villarsia, exactly resembling those of Nymphaea alba, and with several species of Potomogeton. Small grey birds, like the warblers of the reeds, flit from stem to stem; hosts of brilliant gyrinus play on the water; notonectes and beetles, resembling the hydrophili, live within it--now rising to respire, now swiftly diving. Limnaea, similar to those of Europe, creep along the surface of the water; small Planorbis live on the water-plants, to which also adhere Ancylus; and Paludina, Cyclas, and Unio, furrow its muddy bottom. The spell, however, must not be broken by the noisy call of a laughing jackass (Dacelo gigantea); the screams of the white cockatoo; or by the hollow sound of the thirsty emu. The latitude of this spot was 21 degrees 23 minutes S. I examined the country northward for about five miles, crossing some small undulating or hilly downs of a rich black soil, where the Phonolith frequently cropped out. There were occasional tracts of "devil-devil" land, and patches of scrub, which, at no great distance, united into one mass of Bricklow. Tracing a little creek to its head, I crossed ridges with open forest. Mr. Gilbert and Charley returned, after having found, as I anticipated, a considerable watercourse at the foot of the westerly range. Suttor Creek was afterwards found to join this watercourse, and, as it was its principal tributary, the name was continued to the main stream.