Mrs. Lilly wasted no more time, but plunged at once into the middle of the story, which Beatrice heard to the end without interrupting her more than was absolutely necessary. "Colonel Hall came down here to stop, as I said," resumed the old lady, "being a dear friend of my late master. Durban was with him, and Mr. Alpenny was in the house at the time. Later on, Mrs. Hall came down with the baby and the nurse, and with Mrs. Snow, who was then Miss Duncan; but that was not for a week. Colonel Hall had a necklace of diamonds that he had brought from the West Indies; it was valued at ten thousand pounds, and was called the Obi necklace, as there was some legend attached to it." "Obi is African witchcraft," said Beatrice. "Like enough," said Mrs. Lilly indifferently. "Colonel Hall had a lot to do with the black people. My master, Mr. Paslow, warned the Colonel that he might have the necklace stolen; but the Colonel laughed at him. It was in a green box which he kept beside his bed. The box contained official papers, and also the Obi necklace. I understand that Colonel Hall intended to give it to his wife; but as there was some difference between them, he did not give it to her. But when she came down, she asked him for it. He refused, and was sharp with her, so she went to bed in tears. Colonel Hall also retired at ten o'clock. The next morning he was found dead in his bed with his throat cut, and the Obi necklace was gone." "What happened, then?" asked Beatrice, breathlessly. "The police were called in. Mrs. Hall was in a fright, and grew so ill that she had to be taken up to town and put in some hospital. I know that she went from one fainting fit into another, and the doctor said that she would die unless she was taken out of the house. So she and the baby and the nurse were bundled off to town. Mrs. Snow--Miss Duncan, that is--stopped on with Durban. The police could find nothing." "They found the black patch?" "Yes; and there were rumours of a man wearing such a patch having been seen in the neighbourhood. Colonel Hall always slept with his window open, as he was mad on the subject of fresh air. His bedroom was on the first floor of the west wing, and the ivy offered a foothold to any one who wanted to climb up. As the black patch was found on the grass below the window, it was believed that the assassin climbed up the ivy and tried to steal the necklace. Colonel Hall must have awakened: but before he could give the alarm, he was stunned in some way." "Just like Mr. Alpenny," murmured Beatrice. "When he was stunned, the assassin cut the poor man's throat," continued Mrs. Lilly, shuddering. "Ugh! it was a sight. Then the murderer went off with the necklace. The police tried to trace him by that, but could not do so. I expect the necklace was broken up and the stones were sold separately." "The assassin was never caught?" "Never. And it is nearly five-and-twenty years ago, so I don't expect he ever will be caught."