A declaration or proffer of the Archdukes of Brabant : concerning a truce betweene them and the States of the Free vnited Netherlandish Prouinces, tending to the treatie for a perpetuall peace betweene them: or for a surceasance of armes for certaine yeares. Contained in a letter sent vnto the said states. Also the ansvver and acceptance of the states of the vnited prouinces vnto the arch-dukes. Translated out of Netherlandish printed copie.