A writer of a work of this kind must feel grateful to predecessors, who have made it possible for him to gather satisfactory material for his purpose. Special gratitude is due to Thomas Frognall Dibdin, Hartwell Horne, and William Clarke (author of the Repertorium Bibliographicum), who were all thorough workers in this field. The labours of Dibdin have been unjustly depreciated by many modern writers. His works, besides being among the most beautiful books produced in Europe, are mines of bibliographical anecdote and useful literary information. Objections may be made by some to his descriptions, but he certainly greatly influenced the bibliomania of a former age, and made many sales famous which otherwise would have been forgotten except by the few.
There is a gap in the literature of our subject between authors at the beginning of the century and the modern writers, who largely obtain their information from French sources.
H. B. W.