"It is a fact," Mr. Sabin said impressively, "that Duson was a genius. My admiration for him continually increases."
"Duson made harmless reports to us as we desired them," the detective said. "I have an idea, however, that if this course had at any time been inimical to your interests that Duson would have deceived us."
"I am convinced of it," Mr. Sabin declared.
The little hard-visaged man looked steadily for a moment upon the carpet.
"Duson died virtually whilst accepting pay from if not actually in the employ of our Secret Service Department. You will understand, therefore, that we, knowing of this complication in his life, naturally incline towards the theory of murder. Shall I be taking a liberty, sir, if I give you an unprofessional word of warning?"
"By no means," he answered. "But surely you cannot--"
"No, sir," he said drily. "I do not for one moment suspect you. The man was our spy upon your movements, but I am perfectly aware that there has been nothing worth reporting, and I also know that you would never run such a risk for the removal of so insignificant a person. No, my warning comes to you from a different point of view. It is, if you will pardon my saying so, none the less personal, but wholly friendly. The case of Duson will be sifted to the dregs, but unless I am greatly mistaken, and I do not see room for the possibility of a mistake, I know the truth already."
"You will share your knowledge?" Mr. Sabin asked quietly.
"You shall know," he said, "before the last moment. But I want to warn you that when you do know it--it will be a shock to you."
Mr. Sabin stood perfectly still for several moments. This little man believed what he was saying. He was certainly deceived. Yet none the less Mr. Sabin was thoughtful.
"You do not feel inclined," he said slowly, "to give me your entire confidence."
"Not at present, sir," the man answered. "You would certainly intervene, and my case would be spoilt."
"If you care to call on me to-morrow," he said, "I could perhaps show you something which might change your opinion."
"I am always open, sir," he said, "to conviction. I will come about twelve o'clock."
Mr. Sabin went back to the palm lounge. Lucille and Reginald Brott were sitting together at a small table, talking earnestly to one another. The Prince and Lady Carey had joined another party who were all talking together near the entrance. The latter, directly she saw them coming, detached herself from them and came to him.