No Saxon invasion?

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I'm not sure that the tapestry counts as archaeological evidence, or more to the point, why the writings of Bede or Nennius would not have equal historical credibility. The Notitia Dignitatum and its information on the Saxon Shore commands and forces also seem to have been ignored as 'archaeological evidence' of a Saxon threat (or at least the attempt to organize a defense against it).

The tapestry is a contemporary artefact...meets my criteria for archaeology...just because it wasn't dug up out of the ground doesnt mean to say it isnt relevant.

Ignoring the sources from the period is always a mistake. But it is one of the main sources of argument between ancient historians and archaeologists so I am sure students of the Dark Ages or Pre Medievalists (whatever they are called these days) will argue the toss anyway.

Edit: To remove my hideous slepping nistikes!