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0-4-0VBT Chaloner is an example of de Winton's distinctive vertical-boilered design, as used for many years in the North Wales slate quarries. It was built in 1877 at the Union Works in Caernarfon. (The former de Winton factory is located across the road from the present WHR station). 
Chaloner was supplied new to the Pen-y-Bryn slate quarry, Nantlle. Unusually for a de Winton locomotive, it was supplied with an overall cab.
In 1888, it was sold to the nearby Pen-yr-Orsedd Quarry. Penyrorsedd leased the Penybryn tipping tramway in 1890, so for a while Chaloner may have continued to run on its original line. where it ran until about 1950. It was then withdrawn and stored in a locomotive shed with Kerr Stuart Diana.
In 1960, Chaloner was purchased by Alfred Fisher, who restored it to working order.
Leighton Buzzard Light RailwayEdit
The locomotive was used to haul the opening train of the 'Iron Horse Railroad' at Leighton Buzzard in 1968. The railway later became the Leighton Buzzard Light Railway. Though in poor condition it hauled trains there for several years until replaced by more powerful locomotives needed for longer trains. It was housed at the National Railway Museum in York from 1977 until 1983.
Chaloner has received a new boiler fitted at Boston Lodge Works but apart from that is composed of entirely original material, making it unique among mid-Victorian locomotives. The newest part is the water tank which originated on a locomotive called 'Victoria' and dates from 1897. It has been successively improved since preservation. In 2011 it worked a train of two slate wagons and members from Caernarfon (opposite the works where it was built) to Porthmadog on the Welsh Highland Railway a distance of twenty five miles achieving speeds over well over 20 m.p.h. on the flat. A week later it worked to Blaenau Ffestiniog and back with slate wagons. Replacement of valves of the correct size and other adjustments since then have seen further improvements to performance affecting economy.
During its display in the old de Winton works in Caernarfon a works photograph was discovered showing the engine as-built with its cab. A replica cab was built and fitted, but it made conditions difficult for operating and it was removed and placed in store after two years.
Chaloner remains based at Leighton Buzzard.
Visiting other railwaysEdit
Chaloner was a visitor to the Ffestiniog Railway for the 150th Anniversary Celebrations in 1986. It returned in October 1986 for an overhaul at Boston Lodge, including fitting of a new boiler. Another of a number of visits was the Festival of Steam Gala, May 1997.
She has visited 24 other railways, including some in France, Germany and Belgium.
- Fisher, Alfred; Fisher, David; Pierce-Jones, Gwynfor (2011). De Winton of Caernarfon. R.C.L. Publications.
- Fisher, Alfred; Fisher, David. De Winton: Engineers of Excellence. RCL Publications. ISBN 978-0956515711.
- "LEASE of Penybryn Tramway". Gwynedd Archives, ID: Penyrorsedd Additional deposit 1: 93. Caernarfon Record Office.
- Clay, Jonathan (30 May 2015). Locomotive Portraits. Pen and Sword. p. 127.
- Johnson, Peter (30 October 2017). Festiniog Railway. Volume 2: From Slate Railway to Heritage Operation 1921 - 2014. Pen and Sword. p. 204.
- WHR news