Edward the Elder's successor, Æthelstan, met with Sitric at Tamworth in 926. The "Chronicle" does not mention the reason for the meeting, but it reports that an unnamed sister of Æthelstan was married to Sitric. Several years previously, in 918, Æthelstan's predecessor had used a royal marriage to bring Mercia under Wessex control. According to Smyth, the fact the marriage between Sitric and Æthelstan's sister occurred at the old Mercian royal centre at Tamworth reinforces the suggestion that this marriage was supposed to perform a function similar to the one in 918. The agreement reached at Tamworth seems to have necessitated Sitric's conversion to Christianity, though he soon reverted to paganism. Sitric died the following year and was succeeded by his kinsman Gofraid ua Ímair. The "Annals of Ulster" describe his death: