And what about the present time ?" "I see no harm in telling you, sir, that a general watch is kept upon your movements.

Duson was useful to us...

but now Duson is dead." "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.
"And Duson is dead!" Mr.Sabin nodded gravely.
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.