"That's our man, Altenheim. Next?"
"The youngest of the children was a girl, Isilda. The register has an entry, in fresh ink, 'Deceased.'"
"Isilda. . . . Isilda," repeated Lupin. "That's just what I thought: Isilda was Altenheim's sister. . . . I saw a look in her face which I seemed to recognize. . . . So that was the link between them. . . . But the other, the third child, or rather the second?"
"A son. He would be twenty-six by now."
"His name?"
"Louis de Malreich."
Lupin gave a little start:
"That's it! Louis de Malreich. . . . The initials L. M. . . . The awful and terrifying signature! . . . The murderer's name is Louis de Malreich. . . . He was the brother of Altenheim and the brother of Isilda and he killed both of them for fear of what they might reveal."
Lupin sat long, silent and gloomy, under the obsession, no doubt, of the mysterious being.
Doudeville objected: