Firth locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point. However, some firths are exceptions. The Cromarty Firth on the east coast of Scotland, for example, resembles a large loch with only a relatively small outlet to the sea and the Solway Firth and the Moray Firth are more like extremely large bays. The Pentland Firth is a strait rather than a bay or an inlet. These are connected to, or form part of, the
Scotland in the Late Middle Ages married Margaret of Denmark, receiving the Orkney Islands and the Shetland Islands in payment of her dowry. However, in 1482 Berwick, a border fortress and the largest port in medieval Scotland, fell to the English once again, for what was to be the final change of hands. Because medieval Scotland lacked the intrusive government and growing bureaucracy that can be found in contemporaneous England, there is very little evidence on which to base reliable estimates of population before the early 18th century. On the basis that it had roughly a sixth of the farmable land of England, it has been