The first locomotive to use coupled rods was, appropriately-enough, called Locomotion by its builder/inventor, George Stephenson, in 1825. It had two cylinders, powering four drivers. A four-cylinder engine was also built in 1825 by Robert Wilson for the Stockton & Darlington Railway. Before, locomotives only had two drivers, limiting their weight and traction. To the end of steam in England, some multi-drivered locomotives were "uncoupled"—they had cylinders specifically for each pair of drivers.