John,
Many thanks for the link to your Tallis county maps - I'd not seen those
before and they do show the boundaries very clearly.
Carolyn,
A slightly earlier iteration of the county boundaries can be found on the
Vision of Britain Historical Maps site at:
http://visionofbritain.org.uk/maps/index.jsp
You have to work a lot harder to get the information from the early one inch
to the mile maps than you do with John's link I'm afraid. The detail is
terrific when you get there, though, and well worth it.
The VoB historical maps pages don't give the most user friendly of
presentations. This is way I eventually figured to navigate the site:
On the link above, select the 'Boundary Maps' tab.
On that page select the 'Ordnance Survey Unions' link at the top left.
Zoom in on the large map of Britain until you are just showing the county
you are interested in. The list of available maps below the top map will
re-populate as you zoom to show just those on the area you are displaying on
the top map.
Select the map sheet covering your area of interest and then zoom and pan
that very close. You will then see the county boundaries as dotted black
lines. Parish boundaries are shown as narrow yellow lines and Poor Law Union
boundaries as broad multi-coloured lines. The name of each parish is
underlined in red. The date of each map is shown at the bottom right.
Good luck with finding the rest of the changes over time.
Regards
Dave in Oz