Dicuill on the islands of the north

Abstract

An edition, translation, and analysis of Dicuill’s Liber de mensura orbis terrae, vii 6–15 in which verbal and arithmetic features enable the reader to authenticate the text internally, to understand the basis of his correction of the accounts of ancient geographers, and to ascertain possible dates of an expedition by Irish clerics who observed the summer solstice in Iceland and sailed to the polar icecap.