From Historical Hastings

The river Asten was possibly once known as the 'Storsidale', [1] and is named in records of the Norman invasion as being the river whos waters ran red with blood in 1066. The river was utilised until around 1495 for the punishment of Dunking.[1] The river has undoubtedly changed course a number of times before the finally modern channeling behind Bexhill Road to the outlet at the end of Cinque Ports Way. ==

  1. a b J. Manwaring Baines via Hastings and St. Leonards Observer - Saturday 20 November 1954