"How did you hear of that?" interrupted Mrs. Darling. "Oh, I get to hear of many things," was the reply. "It does not matter how. I fear this terror, in one so cold and impassive as your daughter has always been, is rather suggestive of a guilty conscience."

"Why recall this?" asked Mrs. Darling, with a sob. "I think you are wrong in your suspicions."

"I do not recall it to give you pain. Only to impress upon you how essential it is, with these doubts upon our minds, that Mrs. Carleton should be removed from Castle Wafer."

"Indeed, I see it as strongly as you do. But you know what her will has always been. And if our suspicion of her state of mind is wrong, and she is really sane, we are not justified in forcing her actions. Can you remain a few days and watch her, so as to form an opinion of her state? There's a plain, comfortable inn at hand, the Barley Mow, and you could be here very much in the daytime."

"For the matter of that, I could contrive to get invited to stay here," observed the surgeon, with a cough. "That good-natured brother of Sir Isaac's is sure to ask me. And, to tell you the truth, Mrs. Darling, if I undertake to watch her at all, it must be a close and uninterrupted watch."

"Close and uninterrupted!" repeated Mrs. Darling, whom the words did not altogether please. "I am so very fearful of any suspicion being excited abroad as to Charlotte's state."

"That suspicion already exists," remarked the doctor. "Your daughter's manners--these paroxysms that you speak of--have been observed and commented on. It was only a post or two before I got your summons, that I received a letter from this neighbourhood, implying doubts of Mrs. Carleton's state of mind, and inquiring if I could inform the writer whether insanity had been in her family."

Mrs. Darling's breath was nearly taken away with astonishment. "Who could have sent the letter? Surely, not Sir Isaac!"

"The letter was a confidential letter, and I cannot name the writer."

"If it was not Sir Isaac, it must have been Frederick St. John. Why need he meddle?"