Complex sentence: The WDR closed for some weeks at the beginning of 1842 as it was short of money, and the Exchequer Loan Commissioners took possession of the Clarence Railway that September.
Split into simpler sentences: The WDR closed for some weeks at the beginning of 1842 as it was short of money. This had an adverse affect on the revenues of the Clarence and the Exchequer Loan Commissioners took possession of the railway that September.