Conversation so far:
What did Charles Baudelaire next worked on in his final years?
Baudelaire next worked on a translation and adaptation of Thomas De Quincey's Confessions of an English Opium Eater.

Question: What was his next challange
Self-contained rewrite: What was Charles Baudelaire next challenge after translation and adaptation of Thomas De Quincey's Confessions of an English Opium Eater?