A declaration of the Lords and Commons assembled in Parliament : concerning an insolent letter, sent to Mr. Clarke at Craughton neere Brackley in Northamptonshire from Sir Iohn Byron Knight, since the inhabitants of that county apprehended divers rebels under his command as hee with them and divers troops of horse in a trayterous and warlike manner marcht towards Oxford, to the great terror and affrightment of His Majesties good subjects in those parts, whereunto is annexed a copy of the said letter.