Sǽl-wang

According to the Old English Dictionary:

es;

sǽl-wang

m. A fertile plain, plain :-- Hé be wealle geseah wundrum fæste under sǽlwange sweras unlytle by the wall he saw huge pillars with their bases wondrous fast underground. Andr. Kmbl. 2984; An. 1495. Hwílum mec mín freá fæste genearwaþ, sendeþ ðonne under sǽlwonge (MS. sal-), Exon. Th. 382, 27; Rä. 4, 2. Ic geseah hors ofer sǽlwong þrægan, 400, 3; Rä. 20, 3. Hé geseah síde sǽlwongas synnum gehladene, Cd. Th. 78, 14; Gen. 1293. sæl-wang