The Order, under a Prussian Landmeister Heinrich von Plötzke, evicted the Brandenburgers from Danzig in September 1308 but then refused to yield the town to the Poles, and according to some sources massacred the town's inhabitants; although the exact extent of the violence is unknown, and widely recognized by historians to be an unsolvable mystery. The estimates range from 60 rebellious leaders, reported by dignitaries of the region and Knight chroniclers, to 10,000 civilians, a number cited in a papal bull (of dubious provenance) that was used in a legal process installed to punish the Order for the event; the legal dispute went on for a time, but the Order was eventually absolved of the charges. In the Treaty of Soldin, the Teutonic Order purchased Brandenburg's supposed claim to the castles of Danzig, Schwetz (Świecie), and Dirschau (Tczew) and their hinterlands from the margraves for 10,000 marks on 13 September 1309.