Links
Hertfordshire Archives and Local Studies (http://www.hertsdirect.org/libsleisure/heritage1/HALS/)
The British Library (http://www.bl.uk)
National Archives (http://www.nationalarchives.gov.uk)
Ancestry (http://www.ancestry.co.uk)
British History Online (http://www.british-history.ac.uk)
Map History / History of Cartography (http://www.maphistory.info)
Hertfordshire History & Genealogy (http://www.hertfordshire-genealogy.co.uk)
Workhouses (http://www.workhouses.org.uk)