“I thought I would come round, on the chance that you had some hint to give me,” replied Hanslet. “I can’t make head or tail of the business I told you about last night. The more I think about it, the more puzzling it seems. It’s the utter lack of motive that makes it all so inexplicable.” “I believe, mind, I say only that I believe, that I have discovered the motive,” said the Professor quietly. “You have!” exclaimed Hanslet excitedly. Then, seeing the slow movement of the Professor’s head, he smiled. “I know you won’t tell me until you are certain,” he continued. “But at least tell me this. Are there likely to be any more of these mysterious deaths?” “There will be one more, unless I am able to prevent it,” replied the Professor. Chapter XV The Bone Counters Mr. Ludgrove, as Hanslet had said to Dr. Priestley, bore the shock of the finding of the numbered counter extremely well. He had refused to make any alteration in usual habits, and it was with the greatest difficulty that Whyland could persuade him to allow a constable to sleep in the house at night. “I can assure you that this mysterious warning does not terrify me,” he had said. “I am an old man, and death cannot be far off in any case. I am not sure that I should not prefer a violent end to some lingering illness which might leave me helpless for months before it killed me. But, if you think that by keeping a close watch over me you can gain some clue to the distributor of these counters, by all means do so.” He was in this frame of mind when Hanslet came to see him on the Sunday afternoon. Whyland brought him round and introduced him, and Mr. Ludgrove welcomed him with his usual courtesy. “I have heard of you, Inspector Hanslet, and I am indeed proud to make your acquaintance. Sit down, and make yourself comfortable.” “Thank you, Mr. Ludgrove,” Hanslet replied. “I thought you wouldn’t mind my coming to have a chat with you. Whyland here has told me all about these queer happenings in this street of yours, and of the help which you have been to him.” “I am afraid that I have been of very little help,” said Mr. Ludgrove with a smile. “Inspector Whyland has been kind enough to appreciate beyond their value any suggestions I have made.” “Well, that’s as may be,” replied Hanslet. “Now, Mr. Ludgrove, I am going to ask for further assistance on your part. You know as much about these counters as I do. They seem to have been sent, so far, to six men, all of whom have died shortly after they received them. Whyland tells me that he has utterly failed to establish any connection between these men. Except for the fact that Tovey and Copperdock were close friends, they all seem to be comparative strangers to one another, and have never been associated in any common enterprise. You see what I mean, of course?”