The chronicler Widukind of Corvey in his Res gestae saxonicae sive annalium libri tres denoted it as the central region of the medieval Duchy of Saxony lying along the middle reaches of the Weser river between Westphalia and Eastphalia.
Widukind of Corvey, in his Res gestae saxonicae sive annalium libri tres, referred to it as the central area of the medieval Duchy of Saxony situated along the middle stretches of the Weser river between Westphalia and Eastphalia.