Provided neverthelesse That it shall and may be lawfull to and for such Person and Persons as shall by virtue of this Act have Power to make any Rates or Assessments for any of the Purposes herein mentioned of or upon any other Mannors Parishes Lands or Tenements at any time or times hereafter when there shall be occasion for a generall Assessment to rate and assesse the said Mannor of Compton Dundo (if all the said Mannor shall be so adjudged to have Benefit) or such Part or Parts thereof as shall be so adjudged to have Benefit for and with the Payment of any Sum or Sums of Money which shall bear the like Proportion to the Rates and Assessments then to be made of and upon the other Mannors Parishes Lands and Tenements as the Rates and Assessments first made for the opening or cleansing the said Passage Water-Course or Drain last mentioned or for the makeing such New Cut or Cuts Drain or Drains below or Westward of Henly Corner aforesaid shall beare to the Sum so to be adjudged by the said last named Commissioners to be paid for the said Mannor of Compton Dundo or for any Part or Parts thereof and with no greater or other Sum or Sums of Money whatsoever