The whole thing was prearranged, sham packet and all, with the object of making us think the game was up therefore I fancy that we must have been pretty hot on the scent.
I fancy we will solve this mystery soon. 
mnli hypothesis: I fancy we will solve this mystery soon.  premise: The whole thing was prearranged, sham packet and all, with the object of making us think the game was up therefore I fancy that we must have been pretty hot on the scent.