Complex sentence: In Shelley's pocket was a small book of Keats' poetry, upon hearing this, Byron (never one to give compliments) said of Shelley "I never met a man who wasn't a beast in comparison to him".
Split into simpler sentences: In Shelley's pocket was a small book of Keats' poetry. Upon hearing this, Byron (never one to give compliments) said of Shelley "I never met a man who wasn't a beast in comparison to him".