Metaphor: "The general was a devil."The general is being compared to a devil without using "like" or "as".
Simile: "...Through a moonless caribbean night ... Ugh! Its like moist black velvet."The moonless night is being compared to moist black velvet.
Personification: "...trying to peer through the dark tropical night that was palpable as it pressed its thick warm blackness in upon the yacht."The dark night is pressing its thick warm blackness against the yacht.
"We try to be civilized here."
Irony comes into play here because the general is saying that he tries to be civilized however his place is on fire and has weapons everywhere.
"Where there are pistol shots there are men. Where there are men there is food."
The character is suggesting that he is going to go to the island because there are men there.