Folwren
Probably a little piece of vellum saying Eodwine authorizes you to act on his behalf in the matter of collecting taxes and fees and the granting of special dispositions and request as is within your authority, all in very high, legal type terms and such.
Besides the signature at the bottom of the paper, it will most likely have an official impression in sealing wax of Eodwine's family ring or something that bears his crest. (Otherwise - how will Rose know Thornden didn't just write it himself?
)
Thornden would most like be carrying it and perhaps a list of those who are on the tax rolls, with what they owe, all rolled up and in a small leather, capped tube that hangs from your belt or is handy in your pack.
Just a thought.
~ U