 Scholar Hilda Ellis Davidson (1964) comments that "the original form of the creation myth in the north is not easy to determine.Snorri knew of at least three separate accounts".In the 1st century AD, Roman historian Tacitus writes in his ethnographic work "Germania" that the Germanic peoples sing songs about a primeval god who was born of the Earth named Tuisto, and that he was the progenitor of the Germanic peoples.