This chapter discusses the relationship between Shelley and one of his closest friends: Thomas Love Peacock. It sketches the origins and development of that friendship and suggests some reasons for its significance. Particular attention is paid to the very different casts of mind of the two men, something that is especially evident in Peacock’s criticism of what he regarded as Shelley’s culpable neglect of reality, in both his life and his art. Such criticism has its most enduring literary manifestation in Peacock’s caricature of Shelley as Scythrop Glowry in Nightmare Abbey – a novel by which Shelley, to his credit, was delighted. The chapter concludes with an account of Peacock’s peculiarly reticent Memoirs of Percy Bysshe Shelley, in which he sought to defend the biographical dignity of the poet against a malicious and frequently error-prone ‘tribunal of public opinion’.