I confess that I was considerably shocked by this fresh proof of my companion`s theories.
confess 承认
considerably相当大地，大幅度地，非常地
However, there still remained some suspicion in my mind that the whole thing was pre-arranged, intended to dazzle me.
How in the world did you figure that out?
in the world = on earth
There had been no robbery, not is there any evidence as to how the man met his death.
Number 3, Lauriston Gardens wore an unlucky and threatening look.
