The safe accomplishment of this manœuvre, however, fully occupied his every faculty, and it was only when the carriage had come to a standstill before the doors that he had time to glance in the direction of the lady he was to carry off. With a shock of surprise and dismay he saw that not one but two elegantly attired women were about to enter the carriage.

He had not the courage for more than a feeble remonstrance; indeed, it needed all the courage he could muster to lift up his voice at all in the presence of the waiting attendants, and in the brilliant glare of the lamps. After he had driven some way in increasing perplexity and irresolution, he stopped, and tried again to induce Barbara to get out; but the attention the ensuing discussion aroused from the passers-by and the sight of an approaching policeman were too much for his nerves, and he decided hastily to drive on and allow Madame Querterot to deal with this unexpected complication. A glimpse of her face when they arrived in Scholefield Avenue, and she saw what had happened, did not add to his peace of mind. He drove round to Mrs. Wilkinson’s stables, extinguished the carriage lamps, and unharnessed the dun horse by the light of his pocket electric torch as quietly and quickly as he might, his heart sinking at the prospect of what she would say to him when he returned. It was lucky that the stable gate opened on to such a lonely street as the one which ran at the back of the gardens of the houses in Scholefield Avenue.

A blank wall faced it across the road, studded at intervals with the doors to the gardens at the back of the houses in Westford Avenue, which lay beyond. There was another stable some hundred yards further down; but, unless some one were awake and about in that direction, Bert knew that there was little chance of his presence and movements being discovered. Still he could not feel secure for a moment, and it was not till he had put everything in some kind of order and shut the door of the loose box behind him that he breathed again. He hurried round to No. 13, seeing the fancied forms of lurking policemen behind every tree and in every shadow, and it was with a hand already shaking with agitation that he gave the three taps on the door, with which it had been agreed that he should signal his return to Madame Querterot.

She greeted him, as he had feared she would, with a storm of whispered reproaches. What had he been thinking of to bring that girl to the house? Was he mad? As she looked at him, however, in the light of the gas jet which burned at the foot of the stairs, she saw plainly enough that he was in a state of nervousness which she had not expected; and that, if he was to be of any use to her in the crisis that was upon them, she had better employ herself in soothing rather than adding to his distress of mind.

“Well, well,” she interrupted her own words, “it is perhaps of no such great consequence. A little more trouble, possibly, for you; but of that we will talk later. For the moment we must get to business. These summer nights are short and we have much to do before morning. Go into the dining-room, while I prevail upon Miss Turner to leave her friend. I will put her in the library, where she will be out of the way for the present.”

After a few minutes, during which Bert waited, breathless, in the darkness of the dining-room, she was back again, and announced in a whisper that all was well. Barbara had been shown into the back room; and upstairs Mrs. Vanderstein, alone and expectant, awaited the coming of the Prince.

“She has got on all her jewels,” sniggered the Frenchwoman, drawing on her gloves. “And she little thinks that there are here two people who appreciate them as her Prince never could. Ah! Bah! Are there imbeciles in the world? Now then, my friend, you know what you have to do. We rush into the room, you seize this fair creature and hold her fast, while I administer a little whiff of chloroform that shall keep her quiet and prevent any outcry, so that we can remove from her the gems at our ease. See, I have the bottle ready. Allons donc; à la besogne!”

They went softly and quickly up the stairs. Now that the moment for action had arrived, Bert’s confidence was in some measure restored. The sight of the diamonds glittering in the light of the brougham lamp, when Mrs. Vanderstein had stood upbraiding him for his bad driving, had sharpened his appetite for them, and the prospect of fingering the shining things was a pleasant one. Inside the four walls of the house, with the door bolted between them and the interfering outside world, it seemed again safe and desirable enough to take her jewels from this pampered member of the idle rich, and afterwards to lead her blindfolded to some sequestered place, as they had planned, and there release her to find her own way home. Even if she knew where the house was to which she had been decoyed, it would be empty and discreetly silent by the time she could bring to it the avenging hosts of the police. He himself was so well disguised that she never could recognise him again; besides, she would only see him for one moment. True, Madame Querterot was well known to her, but Madame Querterot had her own plans for avoiding any unpleasant consequences of their deed; so she had informed him, and knowing her as he did, he never doubted her intention and capacity of taking care of herself. A medley of these thoughts was in his mind as they mounted the stairs, and paused for an instant at the drawing-room door. No sound came from behind it, and with an encouraging whisper to her companion Madame Querterot turned the handle and went in.

From the end of the room Mrs. Vanderstein rose to greet them, with a radiant, blushing countenance. Always a beautiful woman, she had never been more lovely than at this moment. The smile faded from her lips as she realised that here was not the lover she looked to see; but before she had time to speak Bert was beside her, clutching her round the waist and dragging her back towards the sofa, while over the mouth she opened with a remonstrating cry were clapped the plump hands of Madame Querterot, holding between them something that choked her with its sickly, overwhelming odour.

“See,” said Madame Querterot, after a short interval, “see, she sleeps!” But still she continued to hold the mouth of the bottle over Mrs. Vanderstein’s mouth and nose.