2. How does Marguerite feel when she sees the room that is always locked standing open?

Marguerite feels curious when she spies the unlocked and open door.

A sudden burning, childish curiosity seized her to have a peep at Sir Percy's sanctum. This restriction, of course, did not apply to her, and Frank would, of course, not dare to oppose her. Still, she hoped that the valet would be busy in one of the other rooms, that she might have that one quick peep in secret, and unmolested.

Gently, on tip-toe, she crossed the landing and, like Blue Beard's wife, trembling half with excitement and wonder, she paused a moment on the threshold, strangely perturbed and irresolute.