Bero was eventually appointed as the new bishop in 1248/9, presumably soon after William's visit to Sweden for an important church meeting at Skänninge that ended on 1 March 1248. The so-called "Palmsköld booklet" from 1448 noted that it was Bero who gave the Finns' tax to the Swedish king. Bero came directly from the Swedish court, like his two successors. It seems that Swedish bishops also held all secular power in Finland until the 1280s, when the position of the Duke of Finland was established.