1. Long-Held Grudge: Montresor harbors a deep grudge against Fortunato for an unspecified insult or injury. He has been plotting revenge for a considerable amount of time, indicating that the murder is not a spontaneous act.
2. Preparation of the Setting: Montresor carefully sets the stage for the crime by selecting a secluded location (his family's catacombs) and ensuring that no one else is present. This demonstrates his deliberate planning to avoid any interference.
3. Luring the Victim: Montresor cleverly entices Fortunato to accompany him to his catacombs under the pretense of tasting a rare Amontillado wine. By appealing to Fortunato's weakness for fine wines, Montresor ensures that his victim willingly falls into the trap.
4. Deceptive Behavior: Montresor feigns friendliness and concern for Fortunato's well-being throughout their journey. He compliments him, offers him refreshments, and even expresses worry about his health. This deceptive behavior is part of Montresor's plan to keep Fortunato off guard.
5. Choice of Weapon: Montresor chooses an iron chain and trowel as his weapons, demonstrating his intent to inflict serious harm. He is prepared for violence, indicating that he has thought through the details of how he will carry out the murder.
6. Symbolic Timing: Montresor chooses the carnival season as the backdrop for his crime, knowing that the boisterous celebrations will provide cover for his actions. This timing suggests that Montresor has carefully considered the circumstances that would best facilitate his plan.
7. Manipulation: Montresor uses flattery, manipulation, and a strategic display of alcohol to gradually intoxicate Fortunato and make him more susceptible to the attack. Each step in their interaction is calculated to weaken and deceive Fortunato.
By carefully planning each aspect of the crime, including the setting, the luring of the victim, the choice of weapon, the timing, and the manipulation of Fortunato, Montresor demonstrates the premeditated nature of his murderous intentions in "The Cask of Amontillado."