Draws on the strength of established indexes such as the Nineteenth Century Short Title Catalogue, The Wellesley Index, Poole's Index and Periodicals Index Online to create integrated bibliographic coverage of over 1.5 million books and official publications, 71,000 archival collections and 16.3 million articles published in over 2,500 journals, magazines and newspapers. C19 Index now provides integrated access to 12 bibliographic indexes, including almost a million records from the ongoing digitization of British Periodicals Collections I and II.