Historical information all over

http://www.nls.uk/collections/rare-books/ecco

http://eebo.chadwyck.com/about/about.htm

http://gale.cengage.co.uk/product-highlights/history/eighteenth-century-collections-online.aspx

http://en.wikipedia.org/wiki/Eighteenth_Century_Collections_Online

http://www.library.yale.edu/walpole/collections/other_digital_collections_online.html

http://gdc.gale.com/products/eighteenth-century-collections-online/acquire/faqs/

http://guides.hcl.harvard.edu/content.php?pid=174912&sid=1472166

http://www.bl.uk/reshelp/findhelprestype/prbooks/britprcoll1501to1800/britishprintedcols.html

http://resources.library.georgetown.edu/libdata/page.phtml?page_id=196

http://www.history.ac.uk/reviews/review/408

http://info.library.okstate.edu/content.php?pid=210676&sid=1759008

http://web4.uwindsor.ca/units/leddy/leddy.nsf/HistoryResources!OpenForm

http://www2.lib.udel.edu/database/ecco.html

http://www.uclan.ac.uk/students/library/eebo.php

http://ecollections.mimas.ac.uk/books/about.html

http://www.brookes.ac.uk/library/hist/primarysources.html

http://www.galeuk.com/jiscconsult/reviews.htm