Final answer:
Without analyzing the specific literary text 'The Way of the Water-Hyacinth', it's impossible to determine which literary device is not used among alliteration, repetition, irony, or rhyme scheme.
Step-by-step explanation:
The literary work 'The Way of the Water-Hyacinth' includes various literary devices, but without the text provided it's not possible to determine which of the options - alliteration, repetition, irony, or rhyme scheme - is not included. Alliteration is a rhetorical device characterized by the repetition of consonant sounds at the beginnings of words.
Repetition can signify the repeated use of words or phrases throughout a work. Irony involves a contrast between expectations and reality, often revealing a deeper significance or an unexpected outcome. A rhyme scheme refers to the ordered pattern of rhymes at the ends of the lines of a poem or verse.