[127] See observations on these entrances in notes on the Brough of Birsay.
[128] See Petrie’s Round Towers, pp. 162, 181-5.
[129] Ecclesiastical Notes on the Orkneys, &c.
[130] See account of the early Bishops of Orkney by Professor Munch, in Bannatyne’s Miscellany, Vol. III., 1855.
[131] See Petrie’s Round Towers, and Wilson’s Prehistoric Annals.
[132] See Petrie’s Round Towers.
[133] History of Orkney, p. 34.
[134] Britton, Arch. Ant., Vol. I.; North, Arch. Soc., Part 10, 1860; Billings’ Temple Church.
[135] See Scotland in Early Christian Times, by Joseph Anderson, LL.D., p. 62.