See Marie-Claude Delahaye’s blog:
http://absinthemuseum.auvers.over-blog.com/2020/04/hemingway-a-la-havane.html
Ernest was known to be a massive fan of absinthe:
https://lafee.com/?s=hemingway
Through his life, his writings, drinking in person, to his own personal cocktail:
https://www.diffordsguide.com/cocktails/recipe/953/hemingway