Some of these farmers were doing their share in helping the progress of agriculture. In 1764 Joseph Elkington, of Princethorpe in Warwickshire, was the first to practise the under drainage of sloping land that was drowned by the bursting of springs. He drained some fields at Princethorpe which were very wet, and dug a trench 4 or 5 feet deep for this purpose; but finding this did not reach the principal body of subjacent water, he drove an iron bar 4 feet below the bottom of his trench and on withdrawing it the water gushed out. He was thus led to combine the system of cutting drains, aided when necessary by auger holes. His main principles were three: (1) Finding the main spring, or cause of the mischief. (2) Taking the level of that spring and ascertaining its subterranean bearings, for if the drain is cut a yard below the line of the spring the water issuing from it cannot be reached, but on ascertaining the line by levelling the spring can be cut effectually. (3) Using the auger to tap the spring when the drain was not deep enough for the purpose.[483] It was owing to the Board of Agriculture at the end of the century that he obtained the vote of L1,000 from Parliament, and a skilful surveyor was appointed to observe his methods and give them to the public, for he was too ignorant himself to give an intelligible account of his system. After the publication of the report his system was followed generally until Smith of Deanston in 1835 gave the method now in use to his country.