To manufacturers whose works and premises are not near densely populated districts or ports--the great centres of consumption or export--the change would be disastrous. They would be driven out of the field by more favourably situated competitors, who would acquire a monopoly. The pursuit of certain trades would become impossible in districts in which they are now carried on with success. Not a few manufactories would soon be closed, but for the facilities which they now possess for procuring raw materials from remote parts. To give a few illustrations out of many: South Staffordshire is supplied with iron ore or pig-iron from Staveley in Derbyshire, Westbury in Wiltshire, Fawler in Oxfordshire, Frodingham in Lincolnshire, Ulverstone and Wigan in Lancashire, Middlesborough in Yorkshire, and also from South Wales; and it receives limestone from Froghall in North Staffordshire, Minera in Denbighshire, Wirksworth in Derbyshire, Presteign in Radnorshire, and Porthywaen in Shropshire.[11] Such are examples of the interdependence of districts and industries, the co-operation of places far apart, with which equal mileage rates would interfere. Even if originally they would have been beneficial they would revolutionize the conditions under which trade has been carried on in this country since the introduction of railways.[12] [10] See preface to Smiles’ Life of Stephenson, and, as to the provisioning of Paris by means of railways, interesting details in _La Transformation Des Moyens de Transport, par Alfred de Foville, Chef de Bureau au Ministère des Finances_, p. 256. [11] About thirty years ago, when the iron works at Westbury in Wiltshire were constructed, it was anticipated that fuel would be obtained from the Badstock district, about 14 miles distant. But after sinking collieries it was found that the coke was not suitable; so that it has now to be obtained from South Wales, a distance of about 130 miles. The pig iron is sent to South Wales in the return coke wagons, and also to South Staffordshire, a distance of 140 miles. The coke and pig iron are carried at special low rates below those in force for traffic to intermediate places. Without such special rates, or if mileage rates were charged, the works would have to be closed. [12] An American writer points out that the following would be the result of applying the principle of equal mileage rates, or of basing rates on cost of service:--