"Do you still accuse me, papa? Do you really believe I am the murderer?"

Etienne Rambert shook his head hopelessly.

"Oh, I wish, I wish," he exclaimed, "that for the honour of our name, and for the sake of those who love us, I could prove you had congenital, hereditary tendencies that made you not responsible! Why could not I have watched over your upbringing? Why has fate decreed that I should only see my son three times at most in eighteen years, and come home to find him—a criminal? Oh, if science could but establish the fact that the child of a tainted mother——"

"Tainted?" Charles exclaimed; "what do you mean?"

"Tainted with a terrible and mysterious disease," Etienne Rambert went on: "a disease before which we are powerless and unarmed—insanity!"

"What?" cried Charles, growing momentarily more distressed and bewildered; "what is that, papa? Are my wits going? My mother insane?" And then he added hopelessly: "My God! You must be right! Often and often I have been amazed by her strange, puzzling looks and behaviour! But I—I have all my proper senses: I know what I am doing!"

"Was it, perhaps, some appalling hallucination," Etienne Rambert suggested: "some moment of irresponsibility?"

But Charles saw what he meant and cut him short.

"No, no, papa! I am not mad! I am not mad! I am not mad!"

In his intense excitement the young fellow never thought of moderating the tone of his voice, but shouted out what was in his mind, shouted it into the silence of the night, heedless of all but this terrible discussion he was having with the father whom he loved. Nor did Etienne Rambert lower his voice: his son's impassioned protest wrung the retort from him: