Edwin A. Pratt,
A History of Inland Transport and Communication in England…
(1912)
“ The rates are governed by the nature and extent of the traffic, the pressure of competition, either by water, by a rival route, or by other land carriage; but, above all, the companies have regard to the commercial value of the commodity, and the rate it will bear, so as to admit of its being produced and sold in a competing market with a fair margin of profit. ”
