It was no use saying more, young Morgan saw that. As it was, he knew his colonel half suspected him of some treachery, and for the rest of that day put a watch upon him. Twenty times that day he was on the point of risking all consequences and declaring to his officer's face he would have no hand in this bad business. But the thought of how much worse that might be for the folk in the castle kept him to his post. "Well, sir, the day passed, and they kept up a show of besieging the place on the land side, and took care to keep all Fulke's guns turned that way. But at nightfall Colonel Frank called Morgan to him and ordered him to take six men, whom he named, and try the passage. "`If you find a sentinel at this end,' says the colonel, `see he is overpowered and taken before an alarm can be given. Over the cliff will be the shortest way with him. The men you take know their business; and see you perform yours!' he says, with a scowl. `I and the rest of the troop will be ready to storm the place as soon as we see the flames. Go now, lose no time; and, hark you, there is no quarter to-night for traitors!' "This last remark may have been meant for the captain, who knew that, at heart, he was a traitor to the Parliament that night; or it may have been meant for the inmates of the castle. Anyway, it sounded ugly enough, and it was all Morgan could do to hold his peace and make no reply. "He found the six men waiting for him without, and in the darkness they crept stealthily round to the edge of the cliff, where a narrow ledge led down to the end of the cave. "It was a perilous step down, especially to those unaccustomed to the way. But the spot had been carefully marked in the daytime, and presently the little band all stood there at the entrance. Morgan in his secret heart wished some sentinel of the besieged might have perceived them, and so given an alarm. But no; such was the security Fulke felt in the secrecy of his cave that it never entered his head to guard it. "The men entered one by one, with a man carrying a light in front. The passage was too narrow to allow of two abreast, and too low for any one to stand upright in it. So, single file, on hands and knees, they crawled forward. "At last, when they had gone some way, and the sound of the sea grew faint in the distance, Morgan halted his men. "`Give me the light,' says he, `and stay here while I go forward and see how the passage ends.' "He crawled forward to the front of the file and took the torch from the hands of the foremost man. But when he began to move forward he noticed that two of the band followed him at a short distance. "`Did I not order you to remain with the rest?' demands he, angrily. "`Pardon, captain. The colonel bade us keep close to you,' says one of the men, sourly.