"The spalpeen! he's off again," said O'Connor, turning round as they halted to rest a minute, after breasting the hill for half-an-hour. "Hallo, John! Where are ye, boy?" "Here--all right," shouted a voice in the distance, "I'm exploring behind the knoll here. Go ahead; I'll meet ye at the top o' the hill." By that time they were within about an hour's walk of the highest ridge of the island, so they pushed on without delay, expecting to find their lugubrious friend there before them, or not far behind them. It turned out as had been supposed. The mountain ridge formed the summit of the great precipice, along the foot of which they had sailed after quitting the cavern, or, as they had come to call it, the wreck-cave. For some time the two stood on the giddy edge, looking in silence on the tremendous depths below, and the sublime spectacle of illimitable sea beyond, with its myriad facets gleaming in the sunshine. Then they bethought them of their comrade, and turned back to look for him; hallooing now and then as they went, and expecting every moment to see him emerge from one of the gorges that led to the ridge. But there was no answering shout, or any sign of his having been there. Soon, becoming anxious and then alarmed, the two men set to work in earnest to search for their lost comrade, but they sought in vain. Returning to the spot where they had last heard his voice, they continued the search in that direction, and made the rocks echo with their shouting. Still no John Mitford was to be found, and the curious thing was that there seemed to be no very rugged or precipitous formation of land where he could easily have met with an accident. At last, evening approached. "We must go back at wance," said O'Connor, with anxious looks, "an' rouse all the men out to seek for him wi' torches." Without another word they turned and made for the camp as fast as they could go. Meanwhile, Dr Hayward and his party had been successful in their exploration, for they not only discovered a rabbit-warren, but had observed seals basking on the rocks, and found the tracks of goats, or some animal of that kind with divided hoofs. They had even succeeded in getting between a young seal and the water and speared it, so that there was something like jubilation in the camp on their return at the prospect of a fresh meal and better fare in future. But this was abruptly put an end to by the arrival of Slag and his comrade with the news of Mitford's disappearance. Poor Mrs Mitford was thrown into a state of terrible alarm, and at first insisted on accompanying the search party, but under the united entreaties of Eva and Nelly she was prevailed on to remain behind.