With an understanding of ‘bibliography’ in its original sense of writing about books, this chapter provides a genealogy of the British bibliographical essay, commencing with the medieval bibliophile Richard de Bury. It traces the development of that species of essay through the eighteenth century, when essays started widely appearing in broadsides, newspapers, and magazines as well as books, motivating essayists to reflect upon the material form in which they were publishing. Following the periodical essayists’ critique of commercial print culture, Romantic essayists like Charles Lamb, William Hazlitt, and Thomas De Quincey turned their attention to old books, emphasising their tangible, material value, while at the same time upholding literature’s immaterial qualities. In the age of bibliomania, antiquarian books became an opportunity for the bibliographical essay to come into its own among an expanding audience of bibliophiles and collectors.