Steam engines were invented before 1800, and were soon used in factories and railway engines. They were also used in ships from about 1830. The advantage of steam power was that steam ships were no longer dependent on the wind, and could move if there was no wind, or the wind was blowing in the wrong direction. This meant that ship owners could organise regular services from one port to another. It was also much easier to navigate steam ships into narrow ports.
By about 1850, steam ships arrived each week at the larger ports around the coast of Wales.
Gyda diolch i Amgueddfa Ceredigion am y wybodaeth / With thanks to Ceredigion Museum for the information