"We know nothing, Ned, absolutely nothing. We should only bring ourselves into trouble, lay ourselves open to a criminal action for defamation, which the most skillful lawyer in the land could not successfully defend. What do you think I have done to-day?"
"I asked my employer for a holiday, and I have got it. I have been slaving in his office for years without a single week's vacation. He gave me the holiday, three or four weeks, at my option, and I intend to employ the time in remaining with you and assisting in the elucidation of this mystery, if it is ever to be arrived at."
"You are a real friend; but, Bob, that is a nice idea of a holiday, after years of hard work."
"Never mind. The mystery has got tight hold of me, and I don't mean to leave it unless I am compelled by circumstances to do so. You have no objection to company and assistance, I suppose?"
"You see," said Bob earnestly, "I happen to be more closely connected with it than you are. You have no human relation with the parties in the affair, who, until quite lately, were complete strangers to you. I have some sort of connection with them through my nephew Ronald, whom I have seen to-day, and who, I may tell you, is troubled by the inquiries you have made of him. He has no notion of their tendency, but he felt that something is being concealed from him which he has a right to know. It is in his interests, and for his satisfaction, that I enter into a direct partnership with you. Have you succeeded in persuading your good wife to go to the seaside?"
"I have, and she will be away for at least for a fortnight; if necessary I shall insist upon her remaining at Brighton for a longer time."
"So that we are free to set actively to work without interruption."
"My landlady takes her upon trial. There will be no charge for board and lodging, and if she gives satisfaction she will get a shilling a week to commence with."
"I am glad to hear it. And now to get back to your suspicions that Mr. Nisbet may be concealed in the house even while we are talking. He might endeavor to get rid of us, you said. When, and how?"
"When? In the dead of night, when we are sound asleep. How? Well, I put together these facts: Mr. Nisbet's knowledge of dangerous chemicals, the narcotic which Ronald informed you he gave to his stepdaughter, and the significant conclusions which can be drawn from your conversation with Dr. Cooper. I propose, not this evening, to-morrow morning, that you, or we together, pay a visit to Dr. Cooper, and have an interview with him. He has a grievance against Mr. Nisbet; it might be turned to effect."