He walked across to the sideboard and poured himself out a liqueur-glass full of brandy, which he tossed off at a single gulp.
"I'll test her and see what happens," he said aloud, with a chuckle. Then, slipping on his shoes and going to the front door, he opened it, and, having banged it, walked heavily back along the passage to the room.
The noise awakened Marigold, who, all unconscious that Boyne had seen her there, instantly jumped up and listened.
She heard footsteps on the stairs and saw a passing light beneath her door.
She heard him ascend the next flight of stairs towards the locked room, and then carefully opening her door, peered out after him.
Suddenly he turned and descended, as though he had forgotten something, but his quick eye, as he flashed his lamp upon her door, detected that it was noiselessly closing.
In pretence of ignorance he passed down to his own room, and entering it, closed the door heavily.
"Yes," he whispered to himself. "Ah! I was not mistaken! The girl is here in my house to spy upon me! She's dangerous – just as dangerous as the man. And in my game I allow no enemies to confront me!"
Then, laughing grimly, he clenched his bony fists and set his teeth.
Afterwards he retired to bed, leaving the girl listening attentively to noises he purposely made.
CHAPTER XVI
BAITING THE TRAP
Next day Boyne remained in the house until Marigold had left to go to the City – for she was anxious to report the result of her vigil to her lover and then, instead of going out upon his daily collection of insurance premiums, he went to Pont Street.
He arrived at the fine red-brick house about eleven, opening the door with his latchkey. He found his wife in her bedroom, and closing the door, he exclaimed in an unusually excited voice:
"Lilla! there's trouble brewing —very serious trouble!"
"In what direction?" gasped the handsome woman, starting from the long mirror before which she was arranging her blouse.
"That girl Marigold – the old woman Felmore's niece – is suspicious, and she has established herself in my house in order to watch me!"
"Why is she suspicious?"
"I don't know. That's the mystery of it. How much she knows I can't tell."
"One thing is plain," said the woman. "If we are to save ourselves, her lips must be closed. Surely that will be easy – just a nice box of chocolates, tied with ribbon, or something like that – eh? We did it before with little Louise, at Cheltenham."
"Yes – but I don't like doing it. She's really an awfully nice girl, and I haven't the heart to give her a 'dose.'"
"She's watching you, you say! Therefore she's a danger to us all. Didn't I warn you about her weeks ago? If you don't want to court trouble, just give her a box of those beautiful expensive sweets, and then good-bye to all our worries."
Boyne made no answer.
His wife saw his hesitation, and went on:
"It was a rotten trick at Cheltenham, I admit, but it had to be done – just as it must be done in this case. We surely can't afford to take any risks, my dear Bernie! What a good job that you've found out that she suspects – eh?" she remarked. "So she must fade out – and very quickly, too. It's up to you to do the necessary!"
"But the man – this clerk in Mincing Lane – Gerald Durrant. He's a most pertinacious person, it seems. We have, I think, more to fear from him than from the girl," Boyne said.
"Didn't I express doubt a week or so ago, but you assured me that it was all right?" retorted the handsome woman. "Well – what are you going to do?"
"Do! Why, there's only one way – put an end to their inquisitiveness," he replied.
"Do be careful."
Oh, I will be – never fear. But I shall want your assistance, Lilla, and perhaps Ena's too. Neither the man nor the girl is acquainted with either of you, which is one point in our favour."
"Have you thought out any plan?" she asked anxiously.
"I've not completed it yet," he answered.
"There must be no failure, remember," said his wife, betraying considerable anxiety. "What could have aroused the suspicions of this accursed girl, I wonder?"
"Ah! I can't tell. I'm always most careful. But I have confirmed my suspicion that while the girl is in the house the fellow watches outside. He followed me last night, and I led him a pretty good chase up to Hampstead, where I called to see Ted Lyons."
"Ted might be useful – eh?" she exclaimed quickly.
"No. We must keep this affair to ourselves. It's far too dangerous."
"Well, Ena and I will help you. But something ought surely to be done as soon as possible!"
"I quite agree, Lilla. But the question is how shall we act for the best?"
"It's easy to deal with the girl – especially as she's living in your house for a week – but how shall we tackle the man?" she asked.
"That's the difficulty. I don't want anything to happen while she's in my house," was his reply. "I allowed her to stay because I wanted to satisfy myself that she was really spying. Now I've confirmed my suspicions, and we must act."
"Well, at any rate, it's a good thing that we know the truth," the woman answered. "You must have blundered in some way or other, so it is up to you to wriggle out of a very awkward situation."
"It is awkward, I admit," he said, gazing blankly out of the window. "If they got to know the true secret of that upstairs room, it would mean that we should at once be in Queer Street, in more senses than one – shouldn't we?"
"They must not know!" said the woman in a hard, fierce tone. "You will know how to deal with them, Bernard. People who have tried to pry into our private affairs before have, all of them, bitterly regretted it – haven't they?"
Boyne grunted, but made no reply.
"Will you tell Ena?" she asked.
"Not yet. It may only frighten her unduly. When I want her help I'll see her – perhaps to-morrow," was his reply.
"I suppose we ought to have news from Lancaster Gate very soon," she said. "Mrs. Morrison went to tea with Ena yesterday. To-day she has gone back to Brighton, but is due here again to-morrow."
"Yes, we ought to hear of some development soon," he said with a grim smile. "That affair is going all right. It's this girl and her man who are so confoundedly dangerous to our plans."
"You had similar trouble with Aitken a year ago, and you found an easy way out of it, Bernard. No doubt you'll soon think of some means by which an end can be put to their infernal inquisitiveness."
"I have a call to make," he said, rising from his chair suddenly. "I'll be back again this afternoon. I'm going into the City."