And yet whenever he was tempted to desert or quarrel with his colonel the thought of the lady left with no protector at the mercy of such a man held him to his post.

All he could do was once or twice to urge the colonel to raise the siege, or come to terms with its master.

But Frank was bent on vengeance, and at last poor Morgan had to desist for fear of getting suspected himself.
"About three weeks after the siege had begun, when the Roundheads were beginning to lose spirit, and Morgan's hopes were beginning to rise once more, a trooper rushed into the colonel's tent to say he had found a small cave below the top of the cliff which seemed to run up under the castle.

The colonel's eyes blazed at the news, and he ordered the man to lead him instantly to the spot.

Do you see a square grey patch on the face of the cliff up there, sir, nearly at the top, under the south corner ?" "Yes; what is it ?" "That's the mouth of the cave.