That nothing in this Act contained shall in any way affect, alter, lessen, or abridge the Rights of any Person or Persons whomsoever to any Tithes which may be due or payable or liable to be rendered for or in respect of the Lead Ore to be gotten and raised within the said Soke and Wapentake, and Manors or Liberties respectively, or any of them, or any Part or Parts thereof respectively.