"You know where you are, I suppose?" inquired Madame Henrietta.
"Everything leads me to believe I am in Mademoiselle de la Valliere's room."
"You are."
"But I would observe to your highness that this room is a room, and is not a proof."
"Wait," said the princess, as she walked to the foot of the bed, folded up the screen into its several compartments, and stooped down toward the floor. "Look here," she continued; "stoop down, and lift up this trap-door yourself."
"A trap-door!" said Raoul, astonished; for D'Artagnan's words began to return to his memory, and he had an indistinct recollection that D'Artagnan had made use of the same word. He looked, but uselessly so, for some cleft or crevice which might indicate an opening, or a ring to assist in lifting up some portion of the planking.
"Ah, I forgot," said Madame Henrietta, "I forgot the secret spring; the fourth plank of the flooring—press on the spot where you will observe a knot in the wood. Those are the instructions; press, vicomte! press, I say, yourself!"
Raoul, pale as death, pressed his finger on the spot which had been indicated to him: at the same moment the spring began to work, and the trap rose of its own accord.
"It is ingenious enough, certainly," said the princess; "and one can see that the architect foresaw that a very little hand only would have to make use of this spring, for see how easily the trap-door opened without assistance."
"A staircase!" cried Raoul.