She ground her teeth.
"What is the matter ?" asked Em.
The room was in perfect darkness now.
"Nothing," said Lyndall quietly; "only they have locked us in." She turned, and went back to bed again.

But ere long Em heard a sound of movement.

Lyndall had climbed up into the window, and with her fingers felt the woodwork that surrounded the panes.

Slipping down, the girl loosened the iron knob from the foot of the bedstead, and climbing up again she broke with it every pane of glass in the window, beginning at the top and ending at the bottom.
"What are you doing ?" asked Em, who heard the falling fragments.
Her companion made her no reply; but leaned on every little cross-bar, which cracked and gave way beneath her.

Then she pressed with all her strength against the shutter.