But Mrs. Roberts was hopelessly obtuse; she put on her glasses and fumbled among the loose papers on which Dorothy registered her financial transactions, with agonizing bewilderment. In vain I assured her I had copied them off on the book, and they would give her no light on the subject; she could not give them up, and again and again looked them over, and bemoaned Dorothy's inaccuracy and her own stupidity. She hoped I would excuse her, but she could not really get her mind quite clear about that last column; would it be asking too much of me to run it over again aloud. I tried to be patient, and again went over it, and explained the case in all its bearings. I resolutely kept my back to the window, and would, if I could, have forgotten that there was such a thing as sunshine in the world; but, however I may have succeeded in that attempt, I could not help hearing Mr. Rutledge's step on the stone walk outside, as he returned from the direction of the stables; nor could I help being aware that he entered the house, paused a moment in the library, then came upstairs. The fragrance of an Havana penetrating the keyhole, told he had passed this door, and gone into his dressing-room. My fingers flew over the columns; in proportion as my patience diminished Mrs. Roberts' dullness increased; she fretted, she groaned, she bewildered me with questions, and almost crying with vexation, I exclaimed, as I heard the horses coming up from the stable: "Oh, Mrs. Roberts! Won't you please understand! Can't you see the only mistake was in that second figure, and that I've put it all right? Can't you see it balances?" But Mrs. Roberts couldn't see, and her obtuseness redoubled, as Mr. Rutledge's door opened and closed again, and his steps echoed down the staircase and across the hall. I could not help leaning back, and glancing out of the window, while tears of disappointment and vexation rushed to my eyes, as I saw Mr. Rutledge drive off with Michael in the light wagon, and the identical pair of fast trotters that I had made admiring acquaintance with a few days since at the stable. As their hoofs clattered rapidly down the avenue, I could have thrown the account-books at Mrs. Roberts' head, for in truth it began to dawn upon me that that worthy person had had some ends of her own to serve in keeping me so long at the work of elucidation, and that something besides natural dullness of comprehension had been in the way of her understanding my calculations. I began to reflect on the absurdity of supposing that a woman who had for years had the charge of such an establishment as Rutledge, could be in reality so dull and ignorant as she had appeared this morning. There could be no doubt but that she had intended to keep me in the house; for what cause, I could not yet determine.