"Witness went on to relate that, after she had taken in the tray of tea and sandwiches, she went upstairs and found Ann Weber sitting in her room by herself. Mark, the girl explained, had gone off, very disappointed that they couldn't all go together to the cinema. Mrs. Tufnell argued the point for a moment or two, as she didn't see why Ann should have refused to go if she wanted to see the show. But the girl seemed to have turned sulky. Anyway, it was too late, she said, as Mark had gone off by himself: he had booked the places and didn't want to waste them, so he was going to get another friend to go with him. "Mrs. Tufnell then settled down to do some sewing, and Ann turned over the pages of a stale magazine. Mrs. Tufnell thought that she appeared restless and agitated. Her cheeks were flushed and at the slightest sound she gave a startled jump. Presently she said that she had some silver to clean in the pantry, and went downstairs to do it. Some little time after that there was a ring at the front-door bell, and Mrs. Tufnell heard Ann going through the hall to open the door. A quarter of an hour went by, and then another. "Mrs. Tufnell began to wonder what Ann was up to. She put down her sewing and started to go downstairs. The first thing that struck her was that all the lights on the stairs and landing were out; the house appeared very silent and dark; only a glimmer came from one of the lights downstairs in the hall at the foot of the stairs. "Mrs. Tufnell went down cautiously. Strangely enough, it did not occur to her to turn on the lights on her way. After she had passed the first-floor landing she heard the sound of muffled voices coming from the hall below. Thinking that she recognised Ann's voice, she called to her: 'Is that you, Ann?' And Ann immediately replied: 'Coming, aunt.' 'Who are you talking to?' Mrs. Tufnell asked, and as Ann did not answer this time, she went on: 'Is it Mr. Leighton?' And Ann said: 'Yes. He is just going.' "Mrs. Tufnell stood there, waiting. She was half-way down the stairs between the first floor and the hall, and she couldn't see Ann or Mr. Leighton, but a moment or two later she heard Ann's voice saying quite distinctly: 'Well, good-night, Mr. Leighton, see you to-morrow as usual.' After which the front door was opened, then banged to again, and presently Ann came tripping back across the hall. "'You go to bed now, Ann,' Mrs. Tufnell said to her. 'I'll see Mr. Jessup off when he goes. He won't be long now, I dare say.' "'Oh, but,' Ann said, 'Mr. Jessup has been gone some time.' "'Gone some time?' Mrs. Tufnell exclaimed. 'He can't have been gone some time. Why, he was expecting Mr. Leighton, and Mr. Leighton has only just gone.' "Ann shrugged her shoulders. 'I can only tell you what I know, Mrs. Tufnell,' she said acidly. 'You can come down and see for yourself. The office is shut up and all the lights out.' "'But didn't Mr. Leighton see Mr. Jessup?'