Rheneas is the Skarloey Railway's second engine.
Rheneas was built by Fletcher, Jennings, and Co. at Whitehaven and arrived on the Skarloey Railway, in 1865, in time to haul the train carrying the Board of Trade Inspector.
Unlike Skarloey, Rheneas was stern and thoughtful and fell out with Skarloey after he called him a "stick-in-the-mud" following an argument over cabs. The two reconciled after Rheneas saved Skarloey from a landslide, 1867.
Rheneas’ long wheelbase enabled him to ride steadily, but it also made him hard on the track and this, together with the initial absence of a cab, made Skarloey the more heavily used of the two. Unlike Skarloey, Rheneas never returned to Whitehaven. Such repairs as were needed, including the fabrication of a cab at an unknown date, were done at the Skarloey Railway workshops. In 1937 and again in 1943, he was overhauled at the North Western Railway Works at Crovan's Gate.
Rheneas literally saved the railway by keeping service through a very lean period in the late 1940s. By 1945, Skarloey was in need of repairs, leaving Rheneas to run the line. He managed to pull a full train home one rainy day despite jammed valve gear and was rewarded with an overhaul. In 1952, he was sent to England for a heavy overhaul. While there, he was reunited with his twin Dolgoch. Money, however, was tight on both their railways and their repairs could not be completed immediately. His overhaul took place in 1961 and was returned to the Skarloey Railway soon after.
Rheneas, Skarloey, and Rusty were chased by Boulder when it had rolled off from its cliff. Rheneas' line did not have any points, so he was forced to try and outrun he did so, speeding across a viaduct and ended up derailing. The boulder passed by, which Rheneas' driver found preferable to getting squash
IN 2002, Rheneas had another overhaul completed.
He had to encounter the collapsing Blondin Bridge, but made it down safely.