It has been reported that Percy Bysshe Shelley and Mary Shelley often encouraged each other in writing, proofread each other’s works, and made edits. A portion of Percy Bysshe Shelley’s poem “Mutability” is found within Frankenstein when Victor returns to Geneva after being at University for several years. “In the passage, Mary Shelley has taken “Mutability,” assigned it a character (Victor), and converted it to prose” (“Mutability”). Percy’s poem is about the changes and contradictions among people, not places so it leads readers to wonder if he is truly concerned about changes in Geneva or if he is concerned with changes in himself (“Mutability”).
“Mutability.” Foundations of Literary Studies: Reading Frankenstein Two Hundred Years Later, 2018, foundationsofliterarystudies.wordpress.com/tag/mutability.