Hringmaraheiði ‘Ringmere Heath’: The location of this battle is not known for certain, though there is a Ringmere Pit near Thetford in Norfolk which is a likely candidate (see also Note to Ótt Hfl 9/3, where the metre of the two lines is also discussed, and Townend 1998, 38-42). The battle is referred to in the ASC (s. a. 1010), though its location is not named in English sources before John of Worcester (Townend 1998, 41). These sources describe a battle between Ulfcytel’s forces and Viking invaders, which can be reconciled with Sigvatr’s stanza (which implies that Óláfr’s opponents were English) but not with Snorri’s prose. On the historical problems with the sources, and the possibility that Óláfr intially fought against the English but later for them, see Note to st. 6 [All].