It was owing to this defective condition of the roads that the prices of corn still differed greatly in various localities; there would be a glut in one place and a deficiency in another, with no means of equalizing matters. To the same cause must be attributed in great measure the slow progress made in the improvement of agriculture. New discoveries travelled very slowly; the expense of procuring manure beyond that produced on the farm was prohibitive; and the uncertain returns which arose from such confined markets caused the farmer to lack both spirit and ability to exert himself in the cultivation of his land.[494] Therefore farming was limited to procuring the subsistence of particular farms rather than feeding the public. The opposition to better roads was due in great measure to the landowners, who feared that if the markets in their neighbourhood were rendered accessible to distant farmers their estates would suffer. But they were not alone in their opposition; in the reign of Queen Anne the people of Northampton were against any improvement in the navigation of the Nene, because they feared that corn from Huntingdon and Cambridge would come up the river and spoil their market.[495] Horner was very enthusiastic over the improvement recently effected: 'our very carriages travel with almost winged expedition between every town of consequence in the kingdom and the metropolis' and inland navigation was soon likely to be established in every part, in consequence of which the demand for the produce of the land increased and the land itself became more valuable and rents rose. 'There never was a more astonishing revolution accomplished in the internal system of any country'; and the carriage of grain was effected with half the former number of horses. It is clear, however, that he was easily satisfied, and this opinion must be compared with the statements of Young and Marshall, who were continually travelling all over England some time after it was written, and found the roads, in many parts, in a very bad state.