Over this thought she brooded through all the following day. Evening came, and twilight deepened into darkness. At about ten o'clock Hilda left her room and quietly descended the great staircase, and went over toward the chamber occupied by Mrs. Hart. Arriving at the door she stood without for a little while and listened. There was no noise. She gave a turn to the knob and found that the door was open. The room was dark. She has gone to bed, she thought. She went back to her own room again, and in about half an hour she returned. The door of Mrs. Hart's room remained ajar as she had left it. She pushed it farther open, and put her head in. All was still. There were no sounds of breathing there. Slowly and cautiously she advanced into the room. She drew nearer to the bed. There was no light whatever, and in the intense darkness no outline revealed the form of the bed to her. Nearer and nearer she drew to the bed, until at last she touched it. Gently, yet swiftly, her hands passed over its surface, along the quilts, up to the pillows. An involuntary cry burst from her-- The bed was empty! CHAPTER XLVIII. FROM LOVE TO VENGEANCE, AND FROM VENGEANCE TO LOVE. On the night of this last event, before she retired to bed, Hilda learned more. Leaving Mrs. Hart's room, she called at the housekeeper's chambers to see if the missing woman might be there. The housekeeper informed her that she had left at an early hour that morning, without saying a word to any one, and that she herself had taken it for granted that her ladyship knew all about it. Hilda heard this without any comment; and then walked thoughtfully to her own room. She certainly had enough care on her mind to occupy all her thoughts. The declaration of Gualtier was of itself an ill-omened event, and she no longer had that trust in his fidelity which she once had, even though he now might work in the hope of a reward. It seemed to her that with the loss of her old ascendency over him she would lose altogether his devotion; nor could the remembrance of his former services banish that deep distrust of him which, along with her bitter resentment of his rebellion, had arisen in her mind. The affair of Mrs. Hart seemed worse yet. Her sudden appearance, her sharp questionings, her cold incredulity, terminated at last by her prompt flight, were all circumstances which filled her with the most gloomy forebodings. Her troubles seemed now to increase every day, each one coming with startling suddenness, and each one being of that sort against which no precautions had been taken, or even thought of.