 The office was granted instead to Lothair, Count of Derlingau and Nordthüringgau.Lothair ruled the Nordmark from 983 to 1003.Bishop Thietmar of Merseburg, Lothair's nephew, tells in his chronicle that Dedo I was involved in the devastation of the castle of Wolmirstedt which was in the possession of the Counts of Walbeck.