64. “And the paper on the walls?”

65. “Yes.”

66. “You looked into the cellars?”

67. “We did.”

Dupin would not have said this.

68. “Then,” I said, “you have been making a miscalculation, and the letter is not on the premises, as you suppose.”

First Deduction Rejected.

69. “I fear you are right there,” said the Prefect. “And now, Dupin, what would you advise me to do?”

Third Stage of Plot.

70 “To make a thorough research of the premises.”