One day, about the end of the year 1821, two strangers knocked at the door of Mr. Pease's house in Darlington, and a message was brought to him that some persons from Killingworth wanted to speak with him. They were invited in, on which one of the visitors introduced himself as Nicholas Wood, viewer at Killingworth, and then turning to his companion, he introduced him as George Stephenson, engine-wright, of the same place. Mr. Pease entered into conversation with his visitors, and was soon told their object. Stephenson had heard of the passing of the Stockton and Darlington Act, and desiring to increase his railway experience, and also to employ in some larger field the practical knowledge he had already acquired, he determined to visit the known projector of the undertaking, with the view of being employed to carry it out. He had brought with him his friend Wood for the purpose at the same time of relieving his diffidence and supporting his application. Mr. Pease liked the appearance of his visitor: "there was," as he afterward remarked when speaking of Stephenson, "such an honest, sensible look about him, and he seemed so modest and unpretending. He spoke in the strong Northumbrian dialect of his district, and described himself as 'only the engine-wright at Killingworth; that's what he was.'" Mr. Pease soon saw that our engineer was the very man for his purpose. The whole plans of the railway were still in an undetermined state, and Mr. Pease was therefore glad to have the opportunity of profiting by Stephenson's experience. In the course of their conversation, the latter strongly recommended a _railway_ in preference to a tram-road. They also discussed the kind of tractive power to be employed, Mr. Pease stating that the company had based their whole calculations on the employment of _horse_-power. "I was so satisfied," said he afterward, "that a horse upon an iron road would draw ten tons for one ton on a common road, that I felt sure that before long the railway would become the king's highway." But Mr. Pease was scarcely prepared for the bold assertion made by his visitor, that the locomotive engine with which he had been working the Killingworth Railway for many years past was worth fifty horses, and that engines made after a similar plan would yet entirely supersede all horse-power upon railroads. Stephenson was daily becoming more positive as to the superiority of his locomotive, and hence he strongly urged Mr. Pease to adopt it. "Come over to Killingworth," said he, "and see what my engines can do; seeing is believing, sir." Mr. Pease accordingly promised that on some early day he would go over to Killingworth, and take a look at the wonderful machine that was to supersede horses.