They turned and looked after him, drawing close to each other for mutual comfort. It was twilight, when everything is confusing and uncertain. They lost sight of him, then saw him again, like a tall pillar on the edge of the water. There was a confusion of boats coming and going, in which they could not trace whither he went, or how. Katie and her father stood watching, taking no account of the progress of time, or of the cold wind of the night which came in gusts from the hills. They both drew a long sigh of relief when the steamer was put in motion, and went off down the loch with its lights like glow-worms on the yards and the masts. Nor did they say a word to each other as they turned and went home. When inquiries were made afterwards, nothing but the most confused account could be had of the embarkation. The boatman had seen the stranger, but none among them would say that he had conveyed him to the steamer; and on the steamer the men were equally confused, answering at random, with strange glances at each other. Had they carried that passenger down to the foot of the loch? Not even Katie's keen questioning could elicit a clear reply. But when the boat had steamed away, carrying into the silence the rustle of its machinery and the twinkling of its lights, there was another great explosion from the tower of Kinloch Houran, a loud report which seemed to roar away into the hollow of the mountains, and came back in a thousand rolling echoes. A great column of flame shot up into the sky, the stones fell like a cannonade, and then all was darkness and silence. The loch fell into sudden gloom; the men who were labouring at the ruins stopped short, and groped about to find each other through the dust and smoke which hung over them like a cloud. The bravest stood still, as if paralysed, and for a moment, through all this strange scene of desolation and terror, there was but one sound audible, the sound of a voice which cried "Oona! Oona!" now shrill, now hoarse with exhaustion and misery, "Oona! Oona!" to earth and heaven. CHAPTER XVI.