Walker's patent detaching hook, from W Wardle, A Comprehensive Reference Book on Practical Coal Mining, 1889, p 430, redrawn by D Bairstow, 1980
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Bairstow, Damaris, Walker's patent detaching hook, from W Wardle, A Comprehensive Reference Book on Practical Coal Mining, 1889, p 430, redrawn by D Bairstow, 1980 (1980), [C919-1365]. Living Histories, accessed 15/02/2026, https://livinghistories.newcastle.edu.au/nodes/view/104033




