 Meanwhile, Gerward, the bishop of Kujawy (Włocławek), appeared against the Peter Swienca family and demanded that they return episcopal income stolen from him when Peter was governor for the Czech Kingdom.Peter lost the arbitration process, which ordered him to return to the Bishop the enormous amount of 2,000 grzywien.Despite a partial guarantee by Władysław the Short, the Swienca family was unable to pay such a sum; therefore, on 17 July 1307 they changed their allegiance from Władysław to Waldemar, Margrave of Brandenburg, and received from him in fief the towns of Darłowo, Polanowo, Sławno, Tuchola, and Nowe, and received in perpetuity the Land of Slupsk.