John Campbell, 5th Duke of Argyll retired to a castle located on the shore of what loch?
Inveraray Castle: Inveraray Castle (Scottish Gaelic "Caisteal Inbhir Aora," pronounced ] ) is a country house near Inveraray in the county of Argyll, in western Scotland, on the shore of Loch Fyne, Scotland’s longest sea loch.
i don't know