Lord Weary's Castle, Robert Lowell's second book of poetry, won the Pulitzer Prize for Poetry in 1947 when Lowell was only thirty. Robert Giroux, who was the publisher of Lowell's wife at the time, Jean Stafford, also became Lowell's publisher after he saw the manuscript for Lord Weary's Castle and was very impressed; he later stated that Lord Weary's Castle was the most successful book of poems that he ever published. Source: Wikipedia (en)