Complex sentence: On 16 September 1825 the stationary engines were in place and the first locomotive, "Locomotion No.1", left the works on a wagon drawn by horses, and the formal opening of the railway on 27 September 1825 was advertised the following day.
Split into simpler sentences: On 16 September 1825, with the stationary engines in place, the first locomotive, "Locomotion No.1", left the works. The formal opening of the railway on 27 September 1825 was advertised the following day.