“ We moreover the grand wills and precepts aforesaid, and all and singular in the said letters contained, holding firm and valid the same for us and for our heirs, as much as in us is, do accept, approve, ratify, and to the aforenamed stanners, by the tenor of these presents, do grant and confirm, as the letters aforesaid reasonably witness, and as the same stanners and their predecessors, the liberties aforesaid, from the time of grant of the same, have always been accustomed to use and enjoy ”