"'My dear,' she said, giving me the case which held the diamonds as she spoke, 'will you have the goodness to take these to my room, and lock them up in my jewel safe? Here is the key. You must turn the lock twice, and when the revolving shutter moves back, use this smaller key to unlock the inner compartment. Put the case in there, and bring me back the keys when you have changed your dress.' [Illustration: "YOU LOOK BEAUTIFUL, BERYL!"] "I promised to obey, and ran off with a light heart. "The safe where Lady Erstfield kept her jewels was built into the wall, and was of a very ingenious device. Following her directions implicitly, I opened it, placed the case within, and locked the safe carefully again. I then went and changed my dress and returned the keys to Lady Erstfield. Captain Ponsonby, Lady Violet, and I had a pleasant drive, and nothing more was said about the diamonds--I really think we all forgot them. "The next morning Lady Violet came down to breakfast, looking so ghastly pale and so depressed, that even her mother uttered an exclamation of surprise when she saw her. "'My darling, you look positively ill,' she said, going up and kissing her. "Lady Violet gave her a startled and queer look. She made some remark in a very low voice, and with a pettish movement. She then crossed the room to my side, and Lady Erstfield did not question her any further. "Just as we were leaving the breakfast-table, Captain Ponsonby announced his intention of running up to town for the day, and suddenly suggested that he should take the diamonds with him in order to give the jeweller plenty of time to re-set them in the most thorough manner. "'That is a good thought, Geoffrey,' said Lady Erstfield. Then she turned to me. "'You know where the jewels are, Beryl,' she said--'here are my keys--run, dear, and fetch them. I don't allow even my own maid to know the secret of my jewel safe,' she continued, looking at Captain Ponsonby as she spoke. "I ran away, reached Lady Erstfield's room, unlocked the safe, and put in my hand to take out the case. It had vanished. I searched for it at first without any uneasiness, then in bewilderment, then in a sort of frantic terror. There was the empty spot on the floor of the safe where I had placed the case--there were the other cases of jewels pushed aside in some little confusion, but the Ponsonby diamonds had absolutely vanished. "The full horror of the situation had not yet burst upon me--I had not yet even begun to _think_ that anyone would suspect me, but, nevertheless, I felt sick with a sort of nameless terror. "I locked the safe and returned to the breakfast-room. "Lord Erstfield was standing by the hearth, talking to Captain Ponsonby--Lady Erstfield was reading the _Times_, and Violet was kneeling on the floor playing with her favourite pug. Their peaceful faces added to my misery. I know I must have looked wild and frightened--I know when I spoke that my voice must have shaken.