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 taken to the Gulf. This was the occasion of the discovery of another river, which was called the Mitchell, in honour of the distinguished explorer; but it, too, was given up for a shorter course. In this (quarter a deplorable accident occurred. The camp was attacked during night by the blacks, when Gilbert, the naturalist to the expedition, was killed. From this point the journey was continued round the head of the Gulf. Numerous rivers were crossed, some of which had been long before discovered by exploring navigators, and others were now for the first time brought to light. Among the latter were the Gilbert and the Roper, both receiving names in honour of members of the expedition. The Roper River had many tributaries, one of which was called Flying-Fox Creek, from the myriads of these creatures which had chosen it for their haunt. Leichhardt says:—"I went with Charley and Brown to the spot where we had seen the greatest number of flying-foxes, and whilst I was examining the neighbouring tree, my companions shot 67, of which 55 were brought to our camp, which served for dinner, supper, and luncheon." By the 24th of November the expedition had crossed the watershed between the streams flowing into the Gulf and those heading for the Indian Ocean. After much toilsome travel, the South Alligator River was reached, about 60 miles from its mouth and 140 from Port Essington. In this locality the waterfowl are described as being seen, not in crowds, but in "clouds." "Here," says Leichhardt,