Vocaboly.com

[Adrian Bailey]

"Dumbartonshire (sic) County Council was set up in 1889/90, and at the
beginning of the 20th century, some influential councillors had spelling of
the County name changed from Dumbartonshire to Dunbartonshire."
http://en.wikipedia.org/wiki/Dunbartonshire

I think I can see why (although it's not acknowledged here:
http://tinyurl.com/46tc7) but to do this yet leave the county-town's name
unchanged??

btw, Wikipedia's entries on the tradiional counties of Britain are
ridiculously detailed and fascinating, if that's the kind of thing that
furls your socks.

Adrian