Collier, John Payne, 1789-1883, English critic, editor, and forger. The marginal notes and signatures supposedly discovered by him on original documents, especially those concerned with Shakespeare, were later exposed as having been forged by him while in the service of the duke of Devonshire. His authentic work included A Bibliographical and Critical Account of the Rarest Books in the English Language (1865) and the reprinting of early English tracts.