 The Prince of Wales quarry supplied most of the traffic for the railway during its existence.Unlike its predecessor the GJ&PR had a single steam locomotive, a vertical boilered De Winton named "Pert", although it continued to use horses as motive power for most of its existence.The locomotive is believed to have been disused after 1878, and to have been sold in 1896 to Glodd-fa'r-Glai Quarry which was connected to the Nantlle Railway.