under Norway, 33, 35;
first cathedral and bishop's seat at Birsay, 45;
double bishops, 48, 49, 145 (n. 8);
a contingent in expedition against Saxons, 45, 47;
trade with Grimsby, 61;
the bishops, 63;
Sweyn's viking life, 73;
agriculture, 73, 74;
invasion of earl Harald Ungi, 87;
earl Harold Maddadson, after defeat by Ragnvald Gudrodson, fled to, 89;