We soon gained almost another two miles, when I availed myself of the opportunity to satisfy a second time my ambition of outstripping my companions in approaching towards that land of mystery, Central Australia. Desiring Brown to make the river abreast, I ran a short distance further, when I again met the Albert, flowing on as before, with undiminished size. Even this short distance was something to gain in a new and untrodden country. The line of verdure still pointed out the southerly course of the river across the endless plain; and it became natural to speculate on its source or origin; whether it was the drainage of a swamp, or the outlet of some lagoon, fed by the Cordillera to the eastward. But to speculation alone was I reduced, it not being permitted me to clear up this point. All I could do was to give one long lingering look to the southward before I returned. In that direction, however, no curling smoke denoted the presence of the savage; all was lonely and still; and yet even in these deserted plains, equally wanting in the redundance of animal, as in the luxuriance of vegetable life, I could discover the rudiments of future prosperity, and ample justification of the name which I had bestowed upon them. I gazed around, despite my personal disappointment, with feelings of hopeful gratitude to Him who had spread out so fair a dwelling place for his creatures; and could not refrain from breathing a prayer that ere long the now level horizon would be broken by a succession of tapering spires rising from the many christian hamlets that must ultimately stud this country, and pointing through the calm depths of the intensely blue and gloriously bright skies of Tropical Australia, to a still calmer and brighter and more glorious region beyond, to which all our sublimest aspirations tend, and where all our holiest desires may be satisfied. The recent formation of this part of the country was very striking. We met no rocks during our walk; a porphyritic pebble or two being the only stones noticed; they were flattened, evidently showing that the water by which they were carried had a slow motion, which supports the view I have put forward in an early page of this volume, with reference to the gradual northerly discharge of the accumulated waters of Central Australia. EXPLORATION OF THE INTERIOR.