"I am even more than before convinced, Osgod, that there is a secret passage. I was watching him closely when the interpreter told him that I should hand his mother and children over to Gurth. He pressed his lips together, and his face lighted up with exultation for a moment."

"What do you think he came here for, master?"

"He came here to assure himself if possible that their lives would not be sacrificed in the event of his attacking."

"It is a pity you told him they would be safe," Osgod said.

"But they will be safe, and even if we are surprised and slain I would not that Llewellyn should say that it was only the suddenness of his attack that saved their lives. I will place two of our best men at their door with orders that come what may they are to prevent anyone from entering. But I don't think it will come to that. Should the passage enter into the castle, as, if it exists, I have no doubt it does, we shall be prepared to deal with them, if it opens elsewhere we shall have all our force save a few sentries assembled, and though all the walls fall into their hands, we ought to be able to hold it successfully till Gurth arrives to our rescue."

Wulf returned to the castle, and then joined Beorn at his post on the wall facing the wood. He communicated to him his ideas as to the probable existence of a secret passage.

"We must provide a mode of retreat for your men on guard here, Beorn, in case the Welsh enter by either of these yards instead of by the castle. These flanking towers at the angles of the walls cut off all passage. We will construct bridges with two or three planks across these towers, so that your sentries can retreat from the rear wall to the next, and again on to the inner wall. The doors between the courtyards shall be closed, so that should they enter either of these outer courts they will be delayed, and your men will have plenty of time to join us in the defence of the last wall. However, I am convinced the castle itself will be the scene of action. Five sentries will be enough to place on this wall. I will put two on each of the cross walls, so that if your men give the alarm it will be passed along speedily. I shall remove the last plank of the bridge at nightfall, and have Osgod and four men in the turret and two on the wall above them. We shall therefore have fifty-five men in the castle, and that should be ample. They can keep watch and watch, so there will be over twenty-five men under arms, and ready to throw themselves upon the Welsh wherever they may enter."

These arrangements were carried out. At ten o'clock all lights were extinguished, save a torch burning in each room on the ground floor. The floors and walls had been carefully examined and sounded, but nothing suspicious had been discovered. Four men were told off to each room except the great hall, where twenty were gathered in reserve. Half were to keep watch, but all were to lie down. The orders to those who were to keep awake were strict If they heard a noise or saw a stone move they were to keep silent, until two or three men had stepped out, then they were to give the alarm, leap up, and throw themselves upon them.

"Were the alarm given," he said, "before they fairly issued out the stone might be moved back again, and it would give us immense trouble before we could demolish it or find the secret of the spring. Therefore, let them get a footing first."

From time to time either Beorn or Wulf got up and went noiselessly round to the different rooms to see that the watch was vigilant. As had been arranged, each of those on guard raised a hand as they entered a room, so as to show that they were awake. Wulf did not expect that any attempt would be made before midnight. After that hour he sat in a corner of the dais, leaning as if asleep, but with his eyes wandering round the room watching every stone, and his ears listening for the faintest sound. He had no feeling of sleepiness whatever, his senses being all strung up to the highest pitch.