 However, from Tutbury, the royalist army, under Prince Henry, a nephew of Henry III, bypassed Duffield and proceeded to Chesterfield to intercept a force from the North under John d'Ayville.Robert was, therefore, compelled to move northwards, crossing the River Amber, which was then flooded, reaching Chesterfield on 15 May 1266, just as d'Ayville arrived from Dronfield.In what has come to be known as the Battle of Chesterfield, they engaged the Royal forces in battle and were defeated.