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 inconvenienced in shaping his course by the frequent and extraordinary illusions of the mirage of the desert. Referring to one of these perplexing occasions he says:—"I think we have now made the dip of the country toward the south, but the mirage is so powerful that little bushes appear like great gum-trees, which makes it very difficult to judge what is before us; it is almost as bad as travelling in the dark. I never saw it so bright or so continuous as it is now; one would think the whole country was under water." Failing to obtain the object of his search in the north-west, Stuart now directed his journey to the south and east, exploring the central region between Lake Torrens and Lake Gairdner. In this quarter some small patches of fairly good country were found, but the water, in the few places where it was met with, proved to be as bitter as the sea. The blackfellow now, thinking it time to shift for himself, took the way that pleased him best, leaving only the white man, Foster, to assist Stuart in the thick of his difficulties. Hope of a successful issue to their labours was now fast ebbing from the breasts of these indomitable adventurers. After journeying hither and thither for 1,000 miles, they had failed in the prime object of the expedition, their provisions were rapidly disappearing, and the horses were too footsore to travel an ordinary day's march. At this stage the monotony of the scene was broken by a high mountain coming into view, which Stuart named Mount Finke, and from the summit of which he ventured to