The company began trading in 1864 at the Atlas Engine Works, St. George, Bristol, as Fox, Walker and Company, building four and six-coupled saddle tank engines for industrial use. They also built stationary engines and pioneered steam tramcars, the first being tested in Bristol in 1877.  They were taken over by Thomas Peckett in 1880, becoming Peckett and Sons, Atlas Engine Works, Bristol. The company acquired limited liability some years later. By 1900 the two companies had built over 400 locomotives.