With the nineteenth-century enthusiasm for railways came a demand for everfaster locomotives that could haul greater loads than their predecessors. As different companies competed in what is now known as the 'steam era', the face of locomotives was changed forever. The Iron Horse is an accessible and illustrated study of the development of the steam railway locomotive, from Trevithick, Hedley, Blenkinsop, Seguin, Stevenson and other pioneers to the ground-breaking analytical work of Chapelon and his disciples. Here John Walter outlines the fascinating history of steam railway locomotives followed by a comprehensive and easy-to-understand directory based on the Whyte wheel classification system. Packed with images, diagrams and contemporary artworks, this well researched book will be indispensable to casual and serious enthusiasts alike.