Taffy was a Vulcan Foundry 0-4-0T (possibly builder's number 810 of 1878) that worked at the Votty And Bowydd Quarry at Blaenau Ffestiniog from 1880. In 1913, it visited the Festiniog Railway possibly not for the first time) when it was repaired at Boston Lodge workshops. 
- Bradley, Vic (1993). Industrial Locomotives of North Wales. London: Industrial Railway Society. ISBN 0-9010-9672-5. OCLC 27769657. , page(s): 412-413
- Johnson, Peter (2007). An Illustrated History of the Festiniog Railway. Hersham: Oxford Publishing Co. ISBN 0-860936-03-1. OCLC 180463433.