An extended metaphor is a figure of speech that compares two essentially unlike things at some length and in several ways. In “Poison Tree”, the poet compares a tree to the speaker’s anger. Throughout the poem, the tree grows which resembles the speaker’s anger growing. In lines 3-4, his anger just begins to grow, “I was angry with my foe: I told it not, my wrath did grow.” Then in lines 5-6, the speaker waters the tree which helps its growing, the speaker’s anger also grows because he hides it with smiles, “And I watered it in fears, Night and morning with my tears; And I sunned it with smiles, And with soft deceitful wiles.” As the speaker’s anger grows to a maximum point, the tree bears an apple, “And it grew both day and night Till it bore an apple bright,” in lines 9-10. By the last stanza, the speaker tricks the foe and kills him due to his anger, which has now fully grown into a tree with a “poisonous” apple, “And into my garden stole When the night had veiled the pole: In the morning glad I see My foe outstretched beneath the tree.”
Poets use allusions to make an indirect reference to another literary work or to a famous person, place, or event. To me, “The Cask of Amontillado” was an allusion to “A Poison Tree”. I thought this because the apple in “A Poison Tree” was used to trick the foe into going into the garden and getting killed just like Amontillado in “The Cask of Amontillado” was used to trick the foe into going into the catacombs and also getting killed. Out of anger and hatred,