 Pendergast notes that while Iroquoians and topical academics have mostly reached consensus on this theory, some historians have continued to publish other theories and ignore the archaeological evidence.The St. Lawrence Iroquoians did share many cultural, historical, and linguistic aspects with other Iroquoian groups; for example, their Laurentian languages were part of the Iroquoian family and aspects of culture and societal structure were similar.The St. Lawrence Iroquoians appear to have disappeared from the St. Lawrence valley some time prior to 1580.