Gdzie walczył i jak miał na imię brat Mieszka I?

Where did the brother of Mieszko I fight and what was his name? The paper is an attempt to decipher the name of the brother of Mieszko I and place name where battle with german duke Hodon took place in 972, mentioned in Thietmar of Merseburg’s chronicle. They are only known from a single MLat. inscription as Cidebur, and from its Latinized form as Cidini. In an author’s view they should be delatinized as Siecebor and Sitno (Sitna). Based on a substition and transcription analysis, the author formulates a hypothesis concerning the location and progress of the battle.