Hello, you have not shown what is the allusion that this question refers to, which makes it impossible for the question to be answered satisfactorily. however, I can help you by showing that the Allusion is a form of referencing something or someone, causing the reader's understanding to be extended. Thus, if the allusion of the text refers to something good, the reader can perceive that Dupin and the minister have a very good relationship with each other, however, if the allusion refers to something bad, we can understand that the relationship between these two characters is bad.
