Thorolf, bishop of Orkney, 45.
Thorsdale, 70;
valley of Thurso river, 148 (n. 40).
Thorstan the White, 28.
Thorstein the Red, seized C. and S., 20;
father of Groa, who m. Duncan, maormor of Cat, 25.
Thorstein, son of Hall O' Side, 30.
Thurso;
the river, 25, 34, 53;
earl Moddan killed at, 41;