Rev. Alban Butler (171173). Volume I: January. The Lives of the Saints. 1866.
St. Ulfrid, or Wolfred, Bishop and Martyr
HE was an Englishman of great learning and virtue; and preached the faith, first in Germany; afterwards in Sweden, under the pious king Olas II. who first took the title of king of Sweden; for his predecessors had only been styled kings of Upsal. The good bishop converted many to Christ, till in the year 1028, while he was preaching against the idol Tarstans or Thor, and hewing it down with a hatchet, he was slain by the pagans. See Adam of Bremen, who wrote his most faithful History of the Church in the North, in 1080, l. 2. c. 44. Albert Kranxius, l. 4. Metrop. c. 8. Baron. ad an. 1028. n. 10.