“I have no engagement;–come.” (22)
Fortunato is letting Montresor know that he is “free” to go with him to check out the Amontillado. Ironically, this freedom is part of what traps him in the end.
“For the love of God, Montresor!"
“Yes,” I said, “for the love of God!” (83-84)
This is probably when Fortunato finally understands that he is no longer a free man. Fortunato speaks no more when he finds out that Montresor isn’t afraid of God, or worse, that Montresor thinks he’s carrying out God’s will.
“Ha! ha! ha!–he! he!–a very good joke indeed–an excellent jest. We shall have many a rich laugh about it at the palazzo–he! he! he!–over our wine–he! he! he!” (81)
One aspect of the revenge is almost complete. Fortunato is finally starting to feel Montresor’s wrath. Even though he’s walled in and utterly transformed by fear, he won’t verbalize it.