 Data from the Outer Hebrides suggests that pigs were a more important aspect of Viking farming than prior to that time, that red deer numbers may have been controlled rather than the species simply being subject to hunting, that herring fishing became an important commercial consideration and that trade with centres to the south such as Dublin and Bristol may have been important.Coins found at Bornais and Cille Pheadair were produced in Norway, Westphalia, and England, although there were none from Scotland.Ivory from Greenland was also found there.