In the early Middle Ages, Scandinavian influence on British life, language and culture was profound. The Vikings had a major and lasting impact, and their legacy still resonates strongly in modern constructions of British identity and heritage. Scandinavian settlement began in earnest in the late ninth century, especially in the North and East of England, and probably its most enduring and significant effect was on the English language. The Gersum project aims to understand this Scandinavian influence on English vocabulary by examining the origins of up to 1,600 words in a corpus of Middle English poems from the North of England, including renowned works of literature like Sir Gawain and the Green Knight, Pearl, and the Alliterative Morte Arthure.