He did not wonder. He felt as if he were on fire from his head to his feet. At her words he relaxed his arms at once, and she stood up.
"You are so good to me," she said, with an impulse of gratitude for safety which she herself did not understand. "What makes you so good to me?"
He shook his head, as if he could not answer then, and smiled a little sadly.
"Now that you are warm, I must not lose time," he said, a moment later, taking up his lantern.
She sat down in her old place, and gathered her skirt to her feet and watched him as he climbed out and the last rays of light disappeared. Then the pounding at the wall began again, far off, and she tried to count the strokes, as she had done before; but she wished him back, and whether she felt cold or not, she wished herself again quietly folded in his arms, and though she was alone and it was quite dark she blushed at the thought. It seemed to her that the blows were struck in quicker succession now than before. Was he willing to tire himself out a little sooner, so as to earn the right to come back to her?
That was not it. He was growing desperate, and could not control the speed of his hands so perfectly as before. The night was advancing, he knew, though he had not looked at the watch, which was still in Sabina's glove. It was growing late, and he could distinguish no sound but that of the blows he struck at the bricks and the steady roar of the water. The conviction grew on him that Masin was drowned, and perhaps old Sassi too, and that their bodies lay at the bottom of the outer chamber, between the well and the wall of the cellar. If Masin had been able to get into the well, before the water was too high, he would have risen with it, for he was a good swimmer.
So was Malipieri, and more than once he thought of making an attempt to reach the widened slit in the wall by diving. That he could find the opening he was sure, but he was almost equally sure that he could never get through it alive and up to the surface on the other side. If he were drowned too, Sabina would be left to die alone, or perhaps to go mad with horror before she was found. He had heard of such things.
It was no wonder that he unconsciously struck faster as he worked, and at first he felt himself stronger than before, as men do when they are almost despairing. The sweat stood out on his forehead, and his hands tingled, when he drew back the iron to clear away the chips. He worked harder and harder.
The queer little tune did not ring in his head now, for he could think of nothing but Sabina and of what was to become of her, even if he succeeded in saving her life. It was almost impossible that such a strange adventure should remain a secret, and, being once known, the injury to the girl might be irreparable. He hated himself for having brought her to the place. Yet, as he thought it over, he knew that he would have done it again.
It had seemed perfectly safe. Any one could have seen that the water had not risen in the well for many years. Day after day, for a long time, he and Masin had worked in the vaults in perfect safety. The way to the statues had been made so easy that only a timid old man like Sassi could have found it impassable. There had been absolutely no cause to fear that after fifty or sixty years the course of the water should be affected, and the chances against such an accident happening during that single hour of Sabina's visit were as many millions to one. His motive in bringing her had been quixotic, no doubt, but good and just, and so far as Sabina's reputation was concerned, Sassi's presence had constituted a sufficient social protection.