After running his carriages for several years dissensions in the companies that were promoting the new means of travel, and the increasing efficiency of railways, led to the discontinuance of Hancock's energy in this direction. Thereafter he built only a steam phaeton for his personal use; this had seats for three, and was used about the City, Hyde Park and the London suburbs. Hancock's steam vehicles were ten in number--the experimental three-wheeler, the trunnion-engine Infant, the fixed engine Infant, the Era, afterward the Erin, the Enterprise, the Autopsy, the Austrian drag, the Irish drag, the Automaton, and the phaeton. Hancock turned his attention in the later years of his life to developing the use of india-rubber, in connection with his brother, Thomas Hancock, who was one of the foremost rubber manufacturers of England. He secured several patents for improvements in manufacturing rubber. At the time when Hancock was at work upon his steam carriages, Gurney was also in the front and there was considerable jealousy between the two. Dr. Lardner and others were active in exploiting Gurney, while Hancock was supported in controversies by Alexander Gordon, Luke Hebert and others. That Hancock achieved most in the way of definite results and that his experimenting and accomplishments were more markedly along thoroughly intelligent and conservatively practical mechanical lines than any of his rivals is now generally conceded. His carriages were admirable productions as road vehicles, well-built, attractive and comfortable. WILLIAM T. JAMES An engineer of New York, who was engaged in experimenting about 1829 James made, in his shop in Eldridge Court, several small models of vehicles that proved sufficiently satisfactory. His first engine had two-inch cylinders and four-inch stroke. This ran around a track on the floor of his shop, and drew a train of four cars, carrying an apprentice boy on each car. James' second locomotive was mounted on three wheels, two drivers in the rear and a steering wheel, and it ran on the floor or sidewalk. In 1829, James, satisfied with his experimenting, built a steam carriage capable of carrying passengers, and with this he made very good time over the streets and roadways in and about the metropolis. He then adopted the rotary cylinders instead of the reciprocating, in his engine, which had two six-inch cylinders, and was supported on three wheels. On each cylinder were two fixed eccentrics, one for the forward and one for the backing motion. The slide valve of one cylinder had a half-inch lap at each end, and exhausted its steam into the other.