Provided that nothing before in this Act contained shall in any wise extend unto or any wayes concern the Sheriffs of the Citty of London and Middlesex and the Sheriff of Westmerland or either of them or any of the Sheriffs of or belonging to any Citty and County or Town and County within this Realm but that the same Sheriff or Sheriffs shall or may X1doe as heretofore hath been used or accustomed within the said County of Middlesex and Cities of London and Westminster and such other Cities and Counties or Towns and Counties aforesaid Any thing herein before contained to the contrary in any wise notwithstanding