Janet said > "For a more detailed look at how county boundaries have changed over time, take a  look at the detailed county maps .http://www.genuki.org.uk/big/sct/sct_cmap.html  wherein there are maps listing Counties Pre 1890 and thereafter until 1929 and 1975 I'm afraid that these maps are far from accurate -  particularly as regards the Argyll / Inverness-shire boundary - and I would not recommend their use.  For example the Small Isles are shown totally in Inverness-shire which didn't happen until 1890.  Prior to this 4 out of the 5 islands were in Argyll.  Also, in the Clyde estuary, the Cumbraes are shown as being in Ayrshire whereas they were in Bute.  etc Regards Les