Herself and not herself.

What she saw was something that had never been.

But it was something that might be--herself, as Tyson alone had power to make her.

All this came to her as an unexplained, confused terror, a trouble of the nerves; there was no reasoning, no idea; it was all too new.
But if she did not understand her own misery, she understood vaguely what he had said to her.

She got up and went to her writing-table where a letter lay folded, ready for its envelope.