The earliest mention of Sitric in the Irish Annals is in 917 when he and Ragnall, another grandson of Ímar, are described as leading their fleets to Ireland [REF].
According to Downham, the departure of Ragnall and his contingent of warriors may have emboldened Niall Glúndub to try to expel the Uí Ímair from Ireland once again [REF].