A Defence of some proceedings lately depending in Parliament, to render more effectual the act for quieting the possession of the subject, commonly called the Nullum Tempus Act [electronic resource] : with an appendix, containing an affidavit in the Court of Exchequer, concerning a spoliation which has happened among the public records relative to the title of certain estates belonging to the Duke of Portland, lately granted by the Lords of the Treasury to Sir James Lowther