Neither the "Anglo-Saxon Chronicle" nor Æthelweard's "Chronicon" makes mention of Sitric in the years 921–924, between his installation as King of Northubmria and the death of Edward the Elder. However, there are coins in existence which were minted at Lincoln during the period that bear Sitric's name. These are an important piece of evidence since they suggest Sitric ruled a large area south of the Humber, a claim contradicted by the "Anglo-Saxon Chronicle" which says that all the 'Danes' in Mercia ("i.e.", south of the Humber) submitted to Edward in 918. These coins might indicate Viking reconquest of a large area in the years 921–924, which if it did happen went unremarked upon by the "Chronicle". Edward's control of Mercia likely stretched the kingdom's resources to breaking point, allowing Sitric to exploit the ill-will towards Edward that existed among the populace there, with Edward being unable to effectively oppose Sitric. Downham suggests that the silence of the "Chronicle" might be due to Edward's failing power in the latter years of his reign, and its tendency to only record successes and not failures. His death in 924 is not recorded by a number of important Frankish, Welsh and Irish annals, suggesting a fall in importance and standing from the zenith of his power in 920.