42.被冰层保存下来的纺织品：Joel Bergland, “The Farm Beneath the Sand.” Fitzhugh and Ward, North Atlantic Saga, 295-303, 300.
43.一组人旅行到了：Magnus Magnusson and Hermann Pálsson (trans.), The Vinland Sagas: The Norse Discovery of America (1965)：21页提及对格陵兰北部的探险，22页提及1379年的屠杀，23页提到了1492年教皇的信，42—43页提到了哥伦布。
44.这个雕像用海象牙制成：加拿大渥太华历史博物馆，登记号KeDq-7:325。
45.北欧人开始放弃他们在格陵兰的定居点：PAGES 2k Consortium, “Continental-Scale Temperature Variability During the Past Two Millennia.” Nature Geoscience 6 (2013): 339-346.
46.所有这些技术：Robert W. Park, “Adapting to a Frozen Coastal Environment.” The Oxford Handbook of North American Archaeology, ed. Timothy R. Pauketat (2012): 113-123.