Escribió "A Catalogue of Books relating principally to America, arranged under the Years in which they were Printed, 1500-1700" (London, 1832); "Catalogue of Miscellaneous Books in all Languages" (1834); "Bibliotheca Americana; or, a Catalogue of Books in Various Languages, relating to America, printed since the Year 1700" (2 vols., London and New York, 1835); "Bibliotheca Americana Nova" (2 vols., London, 1846) y parte de la "Bibliotheca Americana Vetus".