Henry M. Leland is one of the most important names in the annals of American automobile history, and his early work with Cadillac was perhaps his greatest contribution to the motor industry. From the earliest days of the company, Leland strove to make Cadillac superior in quality to any other motor car, all while employing his knowledge of manufacturing efficiency to keep costs under control. The earliest Cadillacs were small runabouts and touring cars powered by the single cylinder "Little Hercules" engine, originally developed by Leland and Faulconer Engineering, and supplied to Ransom E. Olds. For Leland's Cadillac, the engine was further refined, then centrally mounted beneath the car, putting power down via a chain drive rear axle. These cars proved quite robust, and were built to a very high standard of quality for their day. Continuous refinement led to the Models K and M of 1906, which retained the single cylinder engine and was available as either a light runabout, touring car or panel delivery.