For several years Geordie, as his fellow-colliers affectionately called him, continued to live on at one or other of the Killingworth collieries. In a short time, he entered into a small contract with his employers for "brakeing" the engines; and in the course of this contract, he invented certain improvements in the matter of saving wear and tear of ropes, which were both profitable to himself and also in some small degree pointed the way toward his future plans for the construction of railways. It is true, the two subjects have not, apparently, much in common; but they are connected in this way, that both proceed upon the principle of reducing the friction to the smallest possible quantity. It was this principle that Stephenson was gradually learning to appreciate more and more at its proper value; and it was this which finally led him to the very summit of a great and pre-eminently useful profession. The great advantage, indeed, of a level railway over an up-and-down ordinary road is simply that in the railway the resistance and friction are almost entirely got rid of.

It was in 1810, when Stephenson was twenty-nine, that his first experiment in serious engineering was made. A coal-pit had been sunk at Killingworth, and a rude steam-engine of that time had been set to pump the water out of its shaft; but, somehow, the engine made no headway against the rising springs at the bottom of the mine. For nearly a year the engine worked away in vain, till at last, one Saturday afternoon, Geordie Stephenson went over to examine her. "Well, George," said a pitman, standing by, "what do you think of her?" "Man," said George, boldly, "I could alter her and make her draw. In a week I could let you all go the bottom." The pitman reported this confident speech of the young brakesman to the manager; and the manager, at his wits' end for a remedy, determined to let this fellow Stephenson try his hand at her. After all, if he did no