Brought a message from Mrs. Vandemeyer, I suppose?" 91 "Not exactly," said Tuppence.
I bet you came here to deliver a message from Mrs. Vandemeyer. 
mnli hypothesis: I bet you came here to deliver a message from Mrs. Vandemeyer.  premise: Brought a message from Mrs. Vandemeyer, I suppose?" 91 "Not exactly," said Tuppence.