BIR officials were required to give the contractor all the help and assistance necessary, BIR employees would assist Sanborn to analyze several railroad companies. About this time Congress had delivered the contractor another 150 delinquent accounts. In July 1873, Sanborn extended the contract by 150 companies. Meanwhile, he convinced Congress to allow him take over all of the railroad companies within the United States. Sanborn was trying to collect taxes that BIR employees were also pursuing, causing great disturbance among the employees. Also the commissioners had lodged a formal complaint with the Treasury, which was ignored by the same.