Influence of the Whites through trade relations and collaboration with the Eastern Canadian Inuit made the latter alter their origin myth about Sea Woman. The Whites became incorporated into that myth together with elements of Christianity, and Sea Woman gained in religious significance. This happened prior to the establishment of Christian missions and was furthered by Sea Woman’s traditional role in myth as a mediator of the relationship of exchange between the Inuit and the sea mammals, and also between Inuit of various locales. The method used for substantiation combines structural analysis with ethnohistorical enquiry, and implications of this combination are discussed.