A map of viking raids in France. The Viking siege of Paris
A table displaying the distribution of place names in England with personal and non-personal specifics (from https://www.researchgate.net/publication/284228370_Anglo-Scandinavian_Code-Mixing_in_English_Place-Names) A table displaying the distribution of Old Norse and Old English generics (from https://www.researchgate.net/publication/284228370_Anglo-Scandinavian_Code-Mixing_in_English_Place-Names)
The composition of modern English by language of origin. The Anglo-Saxon Chronicle
Harald also referenced this essay, Categories Were Made for Man : https://slatestarcodex.com/2014/11/21/the-categories-were-made-for-man-not-man-for-the-categories/