"Halt!" echoed Twadeils, although the command was scarcely needed, for his company had stopped at the first word. Yet, they suspected a Pixie trick, and every arm held the sword blade more firmly, and all eyes were more keenly on the alert. Shamrock perceived that the Brownies distrusted him, and again spoke: "We are in earnest. No trick is intended. Descend, and we will follow you and give ourselves up. We have good reasons for our strange action. We have been deserted and deceived by Spite the Spy and our own friends, and shall not now throw our lives away to please or profit them. You may trust my word." [Illustration: FIG. 72.--Shamrock's Fernleaf Tower.] After a brief whispered consultation, Twadeils concluded it wise policy to accept the offered surrender, and gave orders to descend. It must be confessed that he was glad to do this, for he began to fear that serious results would follow, and even that if they should be victorious, precious lives would be lost. There was no relaxing vigilance as the Brownies descended, and when they reached the raft and saw the senseless form of Halfrick stretched upon the deck, they were still better satisfied that they had found so easy an issue from their adventure. The Pixies, true to their word for once at least, came down quietly, and let themselves be bound, after which Shamrock told the following story, which seemed strange indeed to his captors: "Our sentries were stationed last evening as usual, although it was expected that Fort Spinder would be abandoned some time during the night. 'Keep up an active patrol,' said the Captain of the Guard. 'Show yourselves freely to the enemy's pickets, until you get orders from me to retire. Then quietly and hastily withdraw from your posts, and we will go off in the last ship load.' "That seemed all right, and the sentinels on duty, of whom we are a part, suspected nothing when, during the night, the relief guard were ordered to headquarters under pretence of receiving some secret instructions from the Chief. But they never returned. We kept watch long after the time for changing guard; no corporal appeared. Then we sent a messenger to the fort to see what was the matter. He soon returned saying that the fort was abandoned. Not a Pixie was left except the sentinels at the posts! We had been fooled, betrayed, deserted and given over to death by our selfish Chief, who left us as decoys to keep up the appearance that the fort was occupied, in order to deceive you Brownies. A madder lot of Pixies never was seen. If we could have gotten hold of our chiefs we would have made mincemeat of them in short order.