His complete poetical works. According to Wikipedia: "Samuel Taylor Coleridge (1772 – 1834) was an English poet, critic and philosopher who was, along with his friend William Wordsworth, one of the founders of the Romantic Movement in England and one of the Lake Poets. He is probably best known for his poems The Rime of the Ancient Mariner and Kubla Khan, as well as his major prose work Biographia Literaria."