An archipelago of 90 islands, Pomona the largest, lying north of the Scottish mainland, from which they are separated by the Pentland Firth, 7 m. broad. The scenery is tame, the climate is mild and moist; there are no trees, crops are poor; the chief industries are fishing and stock-raising; Kirkwall, with a cathedral, and Stromness are the chief towns. Seized from the Picts by Norse vikings, they passed to James III. as security for the dowry of Margaret of Denmark and were never redeemed. The natives show their Scandinavian ancestry in their features, and the nomenclature is largely Scandinavian.