The Author's acknowledgments are due to the following gentlemen, amongst others, for much valuable information as to the successive improvements effected by Mr. Stephenson in the locomotive engine, and also with reference to the various railways, at home and abroad, with which he was professionally connected:- Mr. Robert Stephenson, M. P.; Mr. Edward Pease, of Darlington; Mr. John Dixon, C. E.; Mr. John Bourne, C. E.; Mr. Thomas Sopwith, C. E.; Sir Joshua Walmsley; Mr. Jonathan Foster, of Wylam; Mr. Charles Parker, of Birmingham; Mr. William Kell, and Mr. Clephan, of Gateshead. Many interesting facts, illustrative of Mr. Stephenson's early career, have also been obtained from William Coe and other humble persons, who were only too proud to have the opportunity of communicating what they remembered of their distinguished fellowworkman.