'Enough, I grant you,' he replied, 'for the mere necessities of life. But what would come of its pleasures? Would not the beleaguered ladies miss the bounty of the marble horse? Whence comes the water he gives so freely that he needeth not to drink himself? He would thirst indeed but for my water-commanding fiend below. Or how would the birds fare, were the fountains on the islands dry in the hot summer? And what would the children say if he ceased to spout? And how would my lord's tables fare, with the armed men besetting every gate, the fish-ponds dry, and the fish rotting in the sun? See you, mistress Dorothy? And for the draw-well, know you not wherein lies the good of a tower stronger than all the rest? Is it not built for final retreat, the rest of the castle being at length in the hands of the enemy? Where then is your draw-well?' 'But this tower, large as it is, could not receive those now within the walls of the castle,' said Dorothy. 'They will be fewer ere its shelter is needful.' It was his tone quite as much as the words that drove a sudden sickness to the heart of the girl: for one moment she knew what siege and battle meant. But she recovered herself with a strong effort, and escaped from the thought by another question. 'And whence comes all this water, my lord?' she said, for she was one who would ask until she knew all that concerned her. 'Have you not chanced to observe a well in my workshop below, on the left-hand side of the door, not far from the great chest?' 'I have observed it, my lord.' 'That is a very deep well, with a powerful spring. Large pipes lead from all but the very bottom of that to my fire-engine. The fuller the well, the more rapid the flow into the cistern, for the shallower the water, the more labour falls to my giant. He is finding it harder work now. But you see the cistern is nearly full.' 'Forgive me, my lord, if I am troubling you,' said Dorothy, about to ask another question. 'I delight in the questions of the docile,' said his lordship. 'They are the little children of wisdom. There! that might be out of the book of Ecclesiasticus,' he added, with a merry laugh. 'I might pass that off on Dr. Bayly for my father's: he hath already begun to gather my father's sayings into a book, as I have discovered. But, prithee, cousin, let not my father know of it.' 'Fear not me, my lord,' returned Dorothy. 'Having no secrets of my own to house, it were evil indeed to turn my friends' out of doors.' 'Why, that also would do for Dr. Bayly! Well said, Dorothy! Now for thy next question.' 'It is this, my lord: having such a well in your foundations, whence the need of such a cistern on your roof? I mean now as regards the provision of the keep itself in case of ultimate resort.'