Old Local Maps

If you're interested in local history, a great source of old maps is

http://www.cassinimaps.com

They sell various flavours of old Ordnance Survey maps, going back to the original (for Shropshire) "Old Series" of 1833-1838

Other key dates are 1902, 1925, and the 1940s

The development of the county/parish can really be seen in these maps.