This quote from The Cask of Amontillado is showing a dark allusion to what Montressor has planned for the ignorant Fortunato. You can tell Fortunato feels almost completely at easy and certainly does not expect what Montressor has planned for him.  Montressor replies to his companion with “And I for your long life.” Poe has Fortunato reference the buried that repose around them, but what Fortunato does not yet know is that he is soon to join them in their final resting place. The reader is unaware of what exactly Montressor has planned, but when you read the quote again, after you know what happens, it becomes obvious that Poe was using dark humor to create an allusion to the unfortunate Fortunato’s fate.