replied. "If these people were not so clever I should not mind. And the more you think of it, sir, the worse it becomes. Fancy that message finding its way into Slater's letter. The thing seems almost impossible; like one of those weird conjuring tricks we used to see in India. And Slater is a cautious man who runs no risks. He wrote that letter in his own hand. He posted it himself, you may be sure. And from the time that it dropped into the letter-box to the time it reached my hand, nobody but the postal officials touched it. Yet there it is, sir, there it is staring us in the face, more deadly and more dangerous than a weapon in the hands of a lunatic. Still, we have got our warning, and I dare say we shall have time——" "But shall we?" Flower said impatiently. "Don't be too sure. You have forgotten what I told you about Miss Galloway and the mysterious hand that was trying to force a way into the conservatory. She doesn't know the significance of that attempt, and there is no reason why she should. But we know, Cotter. We know only too well that the danger is not only coming, but that it is here. Unless I am mistaken it threatens us from more quarters than one. But it is folly to discuss this matter when there is so much to be done! I have friends coming to dinner, curse it, and more are expected later in the evening. I must leave this matter to you and you must do the best you can. Prowl about the place, Cotter. Keep your eyes open. Pry into dark corners. See that all the windows are closed. Perhaps you might also explain something of this to the keeper, and ask him to chain one or two dogs up near the house. They may be useful." "But shall we?" Flower said impatiently. "Don't be too sure. You have forgotten what I told you about Miss Galloway and the mysterious hand that was trying to force a way into the conservatory. She doesn't know the significance of that attempt, and there is no reason why she should. But we know, Cotter. We know only too well that the danger is not only coming, but that it is here. Unless I am mistaken it threatens us from more quarters than one. But it is folly to discuss this matter when there is so much to be done! I have friends coming to dinner, curse it, and more are expected later in the evening. I must leave this matter to you and you must do the best you can. Prowl about the place, Cotter. Keep your eyes open. Pry into dark corners. See that all the windows are closed. Perhaps you might also explain something of this to the keeper, and ask him to chain one or two dogs up near the house. They may be useful." Cotter acquiesced, but it