old narrow gauge 0-4-0 well-tank engine that works on the Talyllyn Railway in Wales. number 2. built after their sibling, Tal-y-llyn, in 1866 to work on the railway. they worked with Tal-y-lynn for many years, he is sympahetic toward his fellow engines, and saved the railway in the 1950s by running the railway themselves while Tal-y-llyn, was indisposed, and got a train back to the station despite having jammed their valve gear on one side