In my 2001 update to the Appendix from ‘Dyffryn Nantlle – a landscape of neglect’ (detailing the preserved steam locomotives of Dyffryn Nantlle) I described Gelli as consisting of the frame, tank and wheelsets –

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• Chaloner
• Blondin
• John Jones
• Talysarn
• Talysarn
• Penybryn
• Loco
• Dorothea
• Slate industry in Wales
• Rail transport in the United Kingdom
• De Winton