"I cannot do it," Vera said quietly. "Forgive me if my words hurt you, but so far I have no evidence to prove that you are anything more than a mere impostor. You claim to be my mother, and perhaps you are. But till tonight I had no mother. For eighteen years Lord Ravenspur has been more than a father to me. If you can give me any satisfactory explanation of this plot against my safety----"

"Oh, I can," the Countess cried. "Two years ago--"

"Be silent!" Silva cried furiously. "I beg your pardon, madam, but I am forgetting myself. I will venture to remind you that your train will not wait."

"That is quite sufficient," Vera said, with dignity. "I will return to my room again. Perhaps the next time I see you, you will have more time for an explanation."

The girl turned and left the room. She walked slowly and sadly up the stairs, and locked herself in. It was not long before she heard the click of the fastening outside. She knew that she was a prisoner once more. It was out of the question to try and realise the meaning of all this extraordinary mystery. There was a certain sense of comfort in the knowledge that she was safe from personal violence. But, beyond this, there was little to light up the dreary prospect. Vera sat there thinking the matter over till the clock struck eleven. Then she glanced up at the ceiling, and stared at the trap-door long and thoughtfully.

She could not hear a sound in the house. Doubtless Silva had retired long ago. Perhaps he was asleep by this time. As to the servants, they were probably not returning till an early hour in the morning. Vera calculated that the house was sufficiently far from London to make a return after the theatre impossible. She was going to risk it. If Silva caught her attempting to escape she could only return to her room again. She changed her dress rapidly. In the pocket of her skirt she placed a a box of matches and a night-light, which she found on the dressing-table. To get through the trap was a matter of a moment. With the aid of a match she found the top of the iron ladder, and when she had let herself down she came at length, as she had expected, to the top of the servants\' staircase. The house was absolutely quiet, and plunged in darkness. Vera scarcely dared to breathe, till, at length, she found herself in the hall. It was tense and nervous work, and the girl was trembling from head to foot. She hardly dared to touch the bolts. She drew them back a fraction at a time. Then she slid off the chain; the links clicked together with a noise that sounded in the girl\'s ears almost like a pistol shot. She turned the handle hurriedly. One moment more, and she would be in the garden.

The disappointment was swift and cruel. The door was locked, and the key was not there. Evidently this was no way of escape. After the first feeling of despair Vera shot the bolts back, and put up the chain once more. It was no use trying the back door, for that would probably be locked, and the key gone. The only possible exit was by way of one of the windows on the ground floor. But here again Vera was doomed to disappointment, for every door was fastened and every key had vanished.

Vera blew out her night-light, and crept softly up the stairs again. She wondered if it were possible to open one of the bedroom windows and leap to the ground. Trembling in every limb she groped her way into one of the rooms, the door of which was open. Once more she ventured to strike a light. The room she was in was furnished like a study. Here was a large table with paper and pens and ink. The walls were lined with books. A strong current of air came in from somewhere; then Vera realised that one of the windows was open. There was a balcony beyond, and on to this she stepped, trying to measure with her eye the distance to the ground. But it was too dark for that. The risk was too great to take. It was like standing on the edge of a precipice. Vera drew back with a shudder. She really had not the courage for such a desperate venture. It would be far better for her to remain where she was until her friends came to her assistance.

With this thought uppermost in her mind Vera turned back to the room again. A sudden gust of air from the open window extinguished the night-light. It was just as well, for almost at the same instant another door opened on the landing, and a shaft of brilliant light shot out. In its rays Vera could see Silva and another man who was a stranger to her. Silva appeared to be in high good spirits. He was chatting gaily to his companion.

"Now you know exactly what I want," he said. "You are to wait by the gate till two o\'clock if necessary, and when those people come along, you are to give me the signal. If they don\'t come by two o\'clock, then we can conclude that something has interfered with ............