Leslie seated himself, took the oars, turned the boat, and backed slowly and cautiously in, holding himself ready to pull out again at the slightest appearance of danger. For the sea rushed against the rocky barrier with tremendous force, while even on this calm day the swing and wash and eddy amongst the loose rocks was formidable. By skilful management Leslie backed the boat to within some thirty feet of the opening; but the position was so perilous that he had to pull out for a few yards to avoid a couple of rocks, which in the movement of the clear water seemed to be rising toward them from time to time, and coming perilously near. Then he shouted, but there was no answer. He shouted again and again, but there was no reply, and a chill of horror, intensifying from moment to moment, came upon all. "Harry! Harry!" cried Louise, now raising her voice, as Madelaine crept closer to her and clutched her hand. But there was no reply. No sound but the rush and splash and hiss of the waters as they struck the rocks, and came back broken from the attack. "What folly!" muttered Leslie, with his face growing rugged. Then quickly, "I don't think you need feel alarmed; I dare say he has swum in for some distance, and our voices do not reach him. Stop a moment." He suddenly remembered a little gold dog-whistle at his watch-chain, and raising it to his lips he blew long and shrilly, till the ear-piercing note echoed along the cliff, and the gulls came floating lazily overhead and peering wonderingly down. "I say, Harry, old man, come out now," cried Pradelle, and then rising from his seat, he placed his hands on either side of his lips, and uttered the best imitation he could manage of the Australian call, "Coo-ey! Coo-ey!" There were echoes and whispers, and the rush and hiss of the water. Then two or three times over there came from out of the opening a peculiar dull hollow sound, such as might be made by some great animal wallowing far within. "Mr Leslie," said Louise, in a low appealing voice, "what shall we do?" "Oh, wait a few minutes, my dear Miss Vine," interposed Pradelle, hastily. "He'll be out directly. I assure you there is no cause for alarm." Leslie frowned, but his face coloured directly, for his heart gave a great throb. Louise paid not the slightest heed to Pradelle's words, and kept her limpid eyes fixed appealingly upon Leslie's, as if she looked to him for help. "I hardly know what to do," he said in a low business-like tone. "I dare not leave you without some one to manage the boat, or I would go in." "Yes, yes, pray go!" she said excitedly. "Never mind us." "We could each take an oar and keep the boat here," said Madelaine quickly; "we can both row." "No, really; I'll manage the boat," said Pradelle. "I think you had better leave it to the ladies, Mr Pradelle," said Leslie coldly. "They know the coast." "Well really, sir, I--"