Manse Everard says that there is a causal loop, that Carl has become a cause of the events that he set out to study. Carl replies that he has merely fitted into what was already there. But surely not? He has started a lineage that is centrally involved in the relevant events. But, if that were all, then events could now be left as they were. However, Carl must do one more thing: return to the fourth century and betray his descendants as recounted in the Norse stories.