Here the two tried to take up again the life of ordered ease that had been theirs at Caernarvon, the little life they had prized and cherished till the governor of Caernarvon prison had thrown a stone into their magic pool, shattering all its mirrored beauty. They spent long mornings on the hillside, cushioned by the heather; long evenings by the lakeside, always careful to choose their resting-place so that they need not see the scars where the waste slate is tipped into the lake, slowly overlaying the green and graceful margin with which Nature, if you let her alone, frames all water mirrors. And once they went as far as the mysterious Round Tower, which stands alone, with no entrance but the doorway high above your head. "What a place to keep your enemy in," he said, "or your friend! Suppose the tower had been my stronghold, in the old days. I could have brought my princess here, and snapped my fingers at her relations drawn round the tower in a ring, shaking their fists at me from their coal-black steeds, and vowing vengeance when the tower should yield--which, of course, it never would." "Your princess would have starved," she said, "and you with her." "Not at all," he assured her; "you underrate the resources of round towers. To say nothing of the goats and sheep which we should drive in and lower to the basement when our scout brought news that your kinsmen were sending out the fiery cross or the blood eagle, or whatever it was that they did send out; and there's an inexhaustible well inside the tower, and of course we should have sacks of meal and casks of mead." "But the enemy--her relations, I mean--would have all the sheep on the mountains and all the flour in the mills. You'd have to give in, in the end." "You forget the underground passage. When we were tired of mocking your uncles and cousins through the arrow-slits of our tower we'd quietly creep away to our great castle--it's at Caernarvon, you know--and call together all my uncles and cousins and sally out and have a great battle, and the sound of our blows on their helmets would be heard on the far side of Anglesea, and down to the very southernmost marches of Merioneth." "But suppose her relations won the battle and shut you up in a dungeon and put her into a convent?"