A river in Britain. The mouth of the river was the site of Arthur’s first battle against the Saxons. As in all of the twelve battles, Arthur was victorious. Possible locations include the Glem in Lincolnshire, the Glen in Northumberland, and the Glyme in Oxfordshire (Chambers, 202). The first is most probable, since Nennius places another of Arthur’s battles in a country called Linnuis, and Linnuis is likely Lindsey, in Lincolnshire.