Orley Farm by Anthony Trollope

I venture to think, I may almost say to hope, that Lady Mason's confession at the end of the last chapter will not have taken anybody by surprise. If such surprise be felt I must have told my tale badly. I do not like such revulsions of feeling with regard to my characters as surprises of this nature must generate. That Lady Mason had committed the terrible deed for which she was about to be tried, that Mr. Furnival's suspicion of her guilt was only too well founded, that Mr. Dockwrath with his wicked ingenuity had discovered no more than the truth, will, in its open revelation, have caused no surprise to the reader; -- but it did cause terrible surprise to Sir Peregrine Orme.

And now we must go back a little and endeavour to explain how it was that Lady Mason had made this avowal of her guilt. That she had not intended to do so when she entered Sir Peregrine's library is very certain. Had such been her purpose she would not have asked Mrs. Orme to visit her at Orley Farm. Had such a course of events been in her mind she would not have spoken of her departure from The Cleeve as doubtful. No. She had intended still to keep her terrible secret to herself; still to have leaned upon Sir Peregrine's arm as on the arm of a trusting friend. But he had overcome her by his generosity; and in her fixed resolve that he should not be dragged down into this abyss of misery the sudden determination to tell the truth at least to him had come upon her. She did tell him all; and then, as soon as the words were out of her mouth, the strength which had enabled her to do so deserted her, and she fell at his feet overcome by weakness of body as well as spirit.