 Scholars have been unable to determine the regnal dates of several kings of this period, including that of Ricberht, with any certainty.Higham surmises that Ricberht's ability to rule for three years, at a time when Edwin was overlord among the Anglo-Saxons, implies that Ricberht was supported by the East Angles in overthrowing Eorpwald, whom they regarded as "overly compliant" towards the Northumbrian king.It has been speculated by Michael Wood and other historians that Ricberht may have been interred in the Sutton Hoo ship-burial near the Wuffingas centre of authority at Rendlesham, but most experts consider Rædwald to be a more likely candidate.