Hi darkuser,

> Anglo-Norman, a type of French used by
> Normans after the conquest of England in 1066. Is
> this any closer?

Possibly ...

>
> What's for certain is that the combination "fet
> par" and "rei" occurs frequently in this document.
> "Rei" is probably some kind of title as in "Henri
> par la grace DEU, Rei de Engleterre", and googling
> "FET PAR" and "PAR QUIE" seems to show that they
> are almost certainly French.

Certainly looks like it, doesn't it ... although, with that long unbroken string of letters, it's very difficult to say ...

Somier also seems to
> be an Old French word no longer in use.

I can't find it in any of my glossaries ...