Her whole mind was a chaos, darkness breaking in upon it, and herself struggling to gain control with her will, as a swimmer struggles with the swirling water.

But in spite of her efforts she was borne down, darkness seemed to break over her, she felt as if her heart was bursting.

The terrible tension grew stronger and stronger, it was most fearful agony, like being walled up.
And then she realised that his presence was the wall, his presence was destroying her.

Unless she could break out, she must die most fearfully, walled up in horror.

And he was the wall.