O did Graham read a book by a teenage girl? Good for Graham! My phone is dying.

"Greene on Capri by Shirley Hazzard" | Goodreads

https://www.goodreads.com/book/show/215777.Greene_on_Capri

Page 48 or thereabouts...

"The Viper of Milan by Marjorie Bowen" | Goodreads

https://www.goodreads.com/book/show/1140665.The_Viper_of_Milan

"The Viper" | Scary Stories to Tell in the Dark Wiki | Fandom

https://scary-stories.fandom.com/wiki/The_Viper