"I have several," said Mr. Mann. "I am perfectly satisfied that the unfortunate fellow we saw together on the occasion of our first meeting was Rex Holland's servant. I was as certain that he was poisoned by a very powerful poisoning. When your trial was on the body was exhumed and examined, and the presence of that drug was discovered. It was the same as that employed in the case of the chauffeur. Obviously, Rex Holland is a clever chemist. I wanted to see you about that. He said at the trial that he had discussed such matters with you." Frank nodded. "We used to have quite long talks about drugs," he said. "I have recalled many of those conversations since the day of the trial. He even fired me with his enthusiasm, and I used to assist him in his little experiments, and obtained quite a working knowledge of these particular elements. Unfortunately I cannot remember very much, for my enthusiasm soon died, and beyond the fact that he employed hyocine and Indian hemp I have only the dimmest recollection of any of the constituents he employed." Saul Arthur nodded energetically. "I shall have more to tell you later, perhaps," he said, "but at present my inquiries are shaping quite nicely. He is going to be a difficult man to catch, because, if all I believe is true, he is one of the most cold-blooded and calculating men it has ever been my lot to meet--and I have met a few," he added grimly. When he said men Frank knew that he had meant criminals. "We are probably doing him a horrible injustice," he smiled. "Poor old Jasper!" "You are not cut out for police work," snapped Saul Arthur Mann; "you've too many sympathies." "I don't exactly sympathize," rejoined Frank, "but I just pity him in a way." Again Mr. Mann looked round cautiously and again lowered his voice, which had risen. "There is one thing I want to talk to you about. It is rather a delicate matter, Mr. Merrill," he said. "Fire ahead!" "It is about Miss Nuttall. She has seen a lot of our friend Jasper, and after every interview she seems to grow more and more reliant upon his help. Once or twice she has been embarrassed when I have spoken about Jasper Cole and has changed the subject." Frank pursed his lips thoughtfully, and a hard little look came into his eyes, which did not promise well for Jasper. "So that is it," he said, and shrugged his shoulders. "If she cares for him, it is not my business." "But it is your business," said the other sharply. "She was fond enough of you to offer to marry you." Further talk was cut short by the arrival of the girl. Their meeting at Geneva had been to some extent a chance one. She was going through to Chamonix to spend the winter, and Saul Arthur Mann seized the opportunity of taking a short and pleasant holiday. Hearing that Frank was in Switzerland, she had telegraphed him to meet her. "Are you staying any time in Switzerland?" she asked him as they strolled along the beautiful quay.