The doctor and Christina moved quickly away together to the bedroom, where Margaret lay with her face towards the door, her dark eyes full of wistful eagerness. Christina thought she had never seen anyone who looked so fragile, so ethereal; it seemed to the girl as though a breath might have power to blow her away. Yet her voice was curiously strong, and the eagerness in her eyes was apparent, too, in her voice. "It was stupid of me to faint," she said, putting out her hands to the girl. "I expect I am not very strong, and all that suddenly flashed upon me when you showed me the pendant, came as a great shock." "When I showed you the pendant?" Christina repeated, and there was unfeigned surprise in her glance. "But did you know; had you seen----" "Yes--I think--I know all about the pendant," came the slow reply; "though I am not sure that I have actually seen it before--I think I know all about it. I believe I can clear up the mystery that has puzzled Arthur--Sir Arthur--and I hope I can prove to him that you are not a thief." "But--how strange," Christina faltered, whilst Dr. Fergusson, standing at the end of the bed, looked intently at his patient, wondering whether by any possibility she could be wandering, and deciding that her eyes and manner were too sane and quiet, to allow such a possibility to be considered. "Not really strange"; a smile illuminated the beautiful face in the bed; "in real life these coincidences happen oftener than people think, and I only wonder I was so foolish as not to see the truth before." "What truth?" Christina asked, feeling more than ever puzzled. "Why--my dear--that you and I have a real tie to one another. I think--no, I am almost sure--that you are my own sister's child." "Oh!" It was the only word that Christina could utter for a long, long moment; then she exclaimed under her breath, "But--how could such a wonderful thing be true? Why do you think it is possible? Could I really, really belong to you? _Oh!_" She spoke breathlessly, her colour coming and going, her eyes bright, and Margaret smiled again. "I believe you could really belong to me," she said, "and it was that beautiful pendant of yours which gave me the clue, which made me realise why I had so constantly felt as if I must have known you before. I am sure your mother was my dear elder sister; and there is so much in you like her--little ways of looking and speaking, little gestures--oh! I don't know why I did not see long ago that you must be Helen's daughter." "Mother's name was Helen," the girl said, "and she often talked to me about her lovely sister, but she always spoke of her as Peg." "That name makes me remember myself as very young indeed," Margaret answered tremulously, her eyes suddenly misty with tears. "When I was just a wild girl with my hair all down my back, Helen called me Peg. And Arthur always thought a nickname rather _infra dig_." "Arthur?" Christina said quickly.