Definitive study of the strange symbolism through which Blake undertook a literary campaign against the political tyranny of his time. Third edition includes updated material, over 30 illustrations, a Chronology, more. «For our sense of Blake in his own times we are indebted to David Erdman more than anyone else.»—Times Literary Supplement. Prefaces. Explanation of Notes. 32 black-and-white illus. Index.