Poe uses symbols to implicitly tell the audience more about the characters and their situation. For example, he repeatedly mentions the bells on Fortunato’s jester costume to remind the audience of Fortunato’s foolish nature.
"the bells jingled...."See in text(The Cask of Amontillado)
Poe continues to mention the jingling of the bells on Fortunato’s cap in order to remind readers of how Fortunato’s jester costume symbolizes the consistently foolish nature of his character.
Poe’s choice to have Fortunato in a jester costume (motley), complete with conical cap with bells, symbolizes Fortunato’s foolishness: he is easily persuaded to follow Montresor and rarely questions him. As Fortunato continues to be tricked, it is only fitting that he look the part.