Historical Newspapers Online contains four major historical resources: Palmer's Index to The Times (London) which covers the period from 1790 to 1905 in The Times. The Official Index to The Times which takes the coverage forward from 1906 to 1980. Palmer's Full Text Online 1785-1870, providing access to the full articles referenced in Palmer's index to The Times. The Historical Index to The New York Times which covers The New York Times from 1851 to September 1922. Every word of the Indexes can be searched. Users can restrict their searches to main headings and to particular dates, pages, text types and publications. The full range of Boolean and proximity search operators is available, as well as the facility for wildcard and truncation searching. Note that the high quality "Print view" of the Times full-text requires Chadwyck-Healey's TIFF viewer plugin, which may be downloaded free of charge from the Historical Newspapers website.