'Lilla'  Hunslet Engineering 0-4-0ST works number 554 built 1891 for the Cilgwyn Quarry, Cilgwyn Mountain, Nantlle, N.Wales - and is often described as being of the 'heavy' quarry type 0-4-0ST to distinguish it from the smaller Port & Alice class types. Was once at the Bala Lake Railway but is now resident on the Festiniog Railway, having being purchased by a group of FR volunteers.