British History Online - Historical Geography
Digital library containing some of the core printed primary and secondary sources for the medieval and modern history of the British Isles. Created by the Institute of Historical Research and the History of Parliament Trust. Historic Ordnance Survey maps in 1:10,560 scale for each county in England. Historic Ordnance Survey maps in 1:2,500 scale for Chester, Colchester, Coventry, Oxford and much of central London.