Believe me, Miss Howard, said Poirot very earnestly, "if Mr. Inglethorp is the man, he shall not escape me. 
Poirot said he wouldn't get away.
mnli hypothesis: Poirot said he wouldn't get away. premise: Believe me, Miss Howard, said Poirot very earnestly, "if Mr. Inglethorp is the man, he shall not escape me. 