One of the ways in which both Dury and Hartlib wished to promote educational reform and further knowledge was by exploiting the facilities of public libraries in London, Oxford, and Cambridge more efficiently. Dury expressed the hope that the work of the librarian might be as ‘a factor and trader for helpes to learning, a treasurer to keep them and a dispenser to apply them to use, or to see them well used, or at least not abused’ (Turnbull, p.257). The Reformed Librarie-Keeper printed various proposals for the organization and use of libraries, which Dury had originally advanced in 1646. It was published together with Dury’s plans for a reformed school in 1650. In that year, Dury was appointed keeper of the library of St James’s Palace (formerly the King’s Library), which was in a state of disorder. He installed new bookcases and urged that the trustees for the selling of the late king’s goods should draw up an inventory of the books and medals, both measures being intended to make the library usable to the public. A few years later, Dury and Henry Langley unsuccessfully proposed Hartlib for the post of Bodley’s Librarian.
As storehouses of learning, in which great strides had already been made to establish accurate classifications, libraries had the potential to be ideal embodiments of the Ark. But the poorly-funded libraries of interregnum England were too chaotic in organization and too inaccessible for ordinary readers to be able to fulfil the role in which Dury and Hartlib had cast them.