Early in June their afflictions were aggravated by a deplorable catastrophe. The flames of their bivouac fire, driven by a strong wind, reduced to ashes their hut and all that they possessed. There was nothing for them now but to live with the friendly natives who had succoured them. Unfortunately, they had disappeared. It was in vain they attempted to seek them out; Burke and Wills never saw them again. On Saturday the 29th of June, the latter, utterly exhausted, insisted that his companions should leave him in the wilderness, while they continued their search after the natives. Unwillingly they consented, and taking a solemn farewell of their unfortunate comrade, they dragged themselves away with aching hearts. Four or five days afterwards, King returned with some birds he had contrived to kill, but found Wills asleep in the arms of death. King was now alone, for the intrepid Burke had also fallen a victim to the cruel spirit of the wilderness, resting on the barren ground, with his face upturned to the southern stars. The sole survivor was fortunate enough to fall in with the natives, who welcomed him cordially, and carried him with them from camp to camp. After two months and a half of this strange existence, he was discovered by a relief party sent out from Melbourne, under the command of Mr. Howitt (September 15, 1861), who also gathered the remains of the two gallant but ill-fated leaders, and reverently consigned them to a decent grave. They had not died in vain. From the shores of Port Philip to those of the Gulf of Carpentaria they had discovered and marked out a practicable route; and when the great Australian colonies shall have pushed forward into the interior, and have occupied the borders of the northern gulf, they will remember with gratitude the brave explorers who sacrificed their lives to effect the passage from one sea to the other. CHAPTER IV. VEGETABLE LIFE IN THE AFRICAN PLAINS. The facts actually ascertained in reference to the Flora of the plains of Central Africa, although as yet of a limited character, form as a whole too comprehensive a subject to be fully discussed in these pages. I must, therefore, confine myself to a rapid survey of the principal botanical features of the countries whose general features and physical aspect I have sketched in the preceding chapters.