"Yes, it does," declared Lupin. "And, from the start, from the first hour when I meddled in this business, some words which Mlle. Darcieux used made me suspect that direction which my investigations must take. 'I was not quite five years old when my mother died,' she said. 'That was sixteen years ago.' Mlle. Darcieux, therefore, was nearly twenty-one, that is to say, she was on the verge of attaining her majority. I at once saw that this was an important detail. The day on which you reach your majority is the day on which your accounts are rendered. What was the financial position of Mlle. Darcieux, who was her mother's natural heiress? Of course, I did not think of the father for a second. To begin with, one can't imagine a thing like that; and then the farce which M. Darcieux was playing ... helpless, bedridden, ill...."
"Really ill," interrupted the doctor.
"All this diverted suspicion from him ... the more so as I believe that he himself was exposed to criminal attacks. But was there not in the family some person who would be interested in their removal? My journey to Paris revealed the truth to me: Mlle. Darcieux inherits a large fortune from her mother, of which her step-father draws the income. The solicitor was to have called a meeting of the family in Paris next month. The truth would have been out. It meant ruin to M. Darcieux."
"Then he had put no money by?"
"Yes, but he had lost a great deal as the result of unfortunate speculations."
"But, after all, Jeanne would not have taken the management of her fortune out of his hands!"
"There is one detail which you do not know, doctor, and which I learnt from reading the torn letter. Mlle. Darcieux is in love with the brother of Marceline, her Versailles friend; M. Darcieux was opposed to the marriage; and—you now see the reason—she was waiting until she came of age to be married."
"You're right," said the doctor, "you're right.... It meant his ruin."
"His absolute ruin. One chance of saving himself remained, the death of his step-daughter, of whom he is the next heir."
"Certainly, but on condition that no one suspected him."