his achievements. While it is well-nigh inconceivable that any important pre-Reformation mission-leader originating from England would have set about his work without papal accreditation, in the case of St. Sigfrid, there are no known records of his dealings with Rome, or with the kings, or archbishops of England. The destruction by fire in 1069 of York Minster's archives has left it impossible to reconstruct in any detail the history of the Scandinavian missions dispatched from England before that date.

Hagiographical narratives of Sigfrid's work in Sweden