She had arranged her plan as to how she would find Norbert, for he had often described the interior arrangements of the Chateau to her.

She knew that his room was on the ground floor, with two windows looking on to the courtyard.

When, however, she reached the old Chateau, she hesitated.
Suppose that she should go to the wrong window.

But she had gone too far to recede, and determined that if any one else than Norbert should open the window, she would turn and fly.

She tapped at the window softly, and then more loudly.