Provided allwayes and bee itt hereby enacted and declared That in case the way or manner of assessing by a Pound-Rate shall prove any wayes prejudiciall or obstructing to the speedy bringing in of the Assessment or any part thereof appointed by this Act That then and in all such Cases the respective Commissioners or any Three of them are hereby authorized and required to order and direct theire respective Assessors (who are hereby required to proceed accordingly) to assesse the respective Summes charged on the respective Counties Rideings Cityes Boroughs Townes and Places mentioned in this Act according to the most just usuall Rates held and practised in such Counties Rideings Cityes Boroughs Townes and Places respectively Any thing in this Act to the contrary thereof contained in any wise notwithstanding.