In 1869, and then in 1872-74, he paid visits to Europe and began his first novel, Roderick Hudson. Late in 1875 he settled in Paris, where he met Turgenev, Flaubert, and Zola, and wrote The American (1877). In December 1876 he moved to London, where two years later he achieved international fame with Daisy Miller. Other famous works include Washington Square (1880), The Portrait of a Lady (1881), The Princess Casamassima (1886), The Aspern Papers (1888), The Turn of the Screw (1898), and three large novels of the new century, The Wings of the Dove (1902), The Ambassadors (1903) and The Golden Bowl (1904). In 1905 he revisited the United States and wrote The American Scene (1907).
During his career he also wrote many works of criticism and travel. Although old and ailing, he threw himself into war work in 1914, and in 1915, a few months before his death, he became a British subject. In 1916 King George V conferred the Order of Merit on him. He died in London in February 1916.
William C. Spengemann is the Hale Professor in Arts and Sciences and Professor of English Emeritus at Dartmouth College. He edited the Penguin Classics edition of Nineteenth-Century American Poetry.