Montresor says to Fortunato "Nemo me impune lacessit". This means "no one attacks me with impunity" This scene shows foreshadowing because Montressor is literally telling Fortunato that he is going to do something to him, but Fortunato cant see through it
Montressor has roquelaire in his pocket. This is ironic because who would have and knee length cloak with them.
The clown costume represents Montressor and how he acts
Fortunauto means fortunate in Italian. It is not very fortunate because he is about to die.
When they are talking about the masons and Montressor tells Fortunato that he is also a masons. Then Fortunato says show me a sign. "It is this", I answered, producing from beneath the folds of my roquelaire a trowel.
When Montresor tells his servants not to leave his house because he wont be back the whole night. He is going to be at the carnival. You would expect a servant would listen to there master.