But when he crept close and peeked in again, there sat the old woman rocking back and forth.

But to-day she stared at the wall before her.
Casey felt a distinct sensation of relief just in knowing that she was, after all, capable of moving.

Now her head was not bent, but rested against the back of her chair.

She was rocking steadily, quietly, with never a halt.
Casey rapped on the window and waited, fighting a nameless dread of the mystery of her.

But she continued to rock and to stare at the wall; if she heard the tapping she gave no sign whatever.