It was most annoying about the poison, there was no doubt of that. He only hoped that whoever picked it up would know nothing about its dangerous qualities. After all, he could be certain about that, as no one but himself knew what the poison was and how it could be used. The person who picked up the bottle would probably throw it away again as useless; and then, again, perhaps when Kitty threw the bottle away the stopper came out, and the contents would be lost. And then Kitty still had more left, but--bah!--she would not use it on Madame Midas. That was the vague threat of a jealous woman to frighten him. The real danger he was in lay in the fact that she might tell Madame Midas the relations between them, and then there would be no chance of his marrying at all. If he could only stop Kitty’s mouth in some way--persuasion was thrown away on her. If he could with safety get rid of her he would. Ah! that was an idea. He had some of this poison--if he could only manage to give it to her, and thus remove her from his path. There would be no risk of discovery, as the poison left no traces behind, and if it came to the worst, it would appear she had committed suicide, for poison similar to what she had used would be found in her possession. It was a pity to kill her, so young and pretty, and yet his safety demanded it; for if she told Madame Midas all, it might lead to further inquiries, and M. Vandeloup well knew his past life would not bear looking into. Another thing, she had threatened him about some secret she held--he did not know what it was, and yet almost guessed; if that was the secret she must be got rid of, for it would imperil not only his liberty, but his life. Well, if he had to get rid of her, the sooner he did so the better, for even on the next day she might tell all--he would have to give her the poison that night--but how? that was the difficulty. He could not do it at this ball, as it would be too apparent if she died--no--it would have to be administered secretly when she went home. But then she would go to Madame Midas’ room to see how she was, and then would retire to her own room. He knew where that was--just off Mrs Villiers’ room; there were French windows in both rooms--two in Mrs Villiers’, and one in Kitty’s. That was the plan--they would be left open as the night was hot. Suppose he went down to St Kilda, and got into the garden, he knew every inch of the way; then he could slip into the open window, and if it was not open, he could use a diamond ring to cut the glass. He had a diamond ring he never wore, so if Kitty was discovered to be poisoned, and the glass cut, they would never suspect him, as he did not wear rings at all, and the evidence of the cut window would show a diamond must have been used. Well, suppose he got inside, Kitty would be asleep, and he could put the poison into the water carafe, or he could put it in a glass of water and leave it standing;