 Though differing from the earlier Wielbark culture, some traditions were continued.One hypothesis, based on the sudden appearance of large amounts of Roman solidi and migrations of other groups after the breakdown of the Hun empire in 453, suggest a partial re-migration of earlier emigrants to their former northern homelands.The 9th-century Old English Widsith, a compilation of earlier oral traditions, mentions the tribe of the "Holmrycum" without localizing it.