Instantly the pestle stopped, and Martine said in a stifled voice:

“Take care; here he comes!”

But Félicité, grown desperate, did not hear, did not let go her hold when Pascal entered hastily. He had supposed that some accident had happened, that some one had fallen, and he stood stupefied at what he saw—his mother on the chair, her arm still in the air, while Martine had withdrawn to one side, and Clotilde, very pale, stood waiting, without turning her head. When he comprehended the scene, he himself became as white as a sheet. A terrible anger arose within him.

Old Mme. Rougon, however, troubled herself in no wise. When she saw that the opportunity was lost, she descended from the chair, without making any illusion whatever to the task at which he had surprised her.

“Oh, it is you! I do not wish to disturb you. I came to embrace Clotilde. But here I have been talking for nearly two hours, and I must run away at once. They will be expecting me at home; they won’t know what has become of me at this hour. Good-by until Sunday.”

She went away quite at her ease, after smiling at her son, who stood before her silent and respectful. It was an attitude that he had long since adopted, to avoid an explanation which he felt must be cruel, and which he had always feared. He knew her, he was willing to pardon her everything, in his broad tolerance as a scientist, who made allowance for heredity, environment, and circumstances. And, then, was she not his mother? That ought to have sufficed, for, in spite of the frightful blows which his researches inflicted upon the family, he preserved a great affection for those belonging to him.

When his mother was no longer there, his anger burst forth, and fell upon Clotilde. He had turned his eyes away from Martine, and fixed them on the young girl, who did not turn hers away, however, with a courage which accepted the responsibility of her act.

“You! you!” he said at last.

He seized her arm, and pressed it until she cried. But she continued to look him full in the face, without quailing before him, with the indomitable will of her individuality, of her selfhood. She was beautiful and provoking, with her tall, slender figure, robed in its black blouse; and her exquisite, youthful fairness, her straight forehead, her finely cut nose, her firm chin, took on something of a warlike charm in her rebellion.

“You, whom I have made, you who are my pupil, my friend, my other mind, to whom I have given a part of my heart and of my brain! Ah, yes! I should have kept you entirely for myself, and not have allowed your stupid good God to take the best part of you!”