The mine closed in 1869 and the main tramway was converted to locomotive haulage as the Cornwall Minerals Railway in 1874, but wagons continued to be moved by horses within the harbour complex.
As well as the very low bridge, this line had a tight 70 feet (21 m) radius curve; these two restrictions had to be taken into consideration when buying locomotives to work at the harbour.
She was kept in the engine shed until 1978, when she was moved to the china clay museum at Wheal Martyn near St Austell and displayed as a static exhibit alongside a locomotive from the Lee Moor Tramway in Devon.
Before Judy could be moved from Wheal Martyn to their base at Bodmin General railway station, a specialist had to remove the asbestos insulation around the boiler.
A £50,000 grant was made from the Heritage Lottery Fund towards her restoration, and the work was supported by both Poltair Community School and the Cornwall Young Archaeologists Club.
One of the four axle journals were found to have suffered water damage while on static display, but otherwise it was in reasonable condition despite not having been in steam for more than 30 years.
Now fitted with a vacuum brake so that she could operate passenger trains, Judy entered service on the Bodmin and Wenford Railway in April 2009.
These included flat handrail mountings instead of turned fittings, and a flush saddle tank without the prominent rivets used on Judy.
[3] No longer required for traffic at Par harbour in 1977, Alfred was moved to the CSLPS site at Bugle in 1978, where a vacuum brake was fitted so that it could haul passenger trains.
[5] August 2002 saw it at St Blazey depot of an open day and it was steamed down the branch to Par harbour, the first time in 25 years.
[6] The Reverend Wilbert Awdry visited the Port of Par in 1966 and he soon wrote Main Line Engines, the 21st volume of The Railway Series of children's books.