The Northern Earldoms: Orkney and Caithness from AD 870 to 1470

The medieval earldoms of Orkney and Caithness were positioned between two worlds, the Norwegian and the Scottish. They were a maritime lordship divided, or united, by the turbulent waters of the Pentland Firth. This unlikely combination of island and mainland territory survived as a single lordship for 600 years, against the odds. Growing out of the Viking maelstrom of the early Middle Ages, it became an established and wealthy principality which dominated northern waters, with a renowned d...