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John Harris

Owner of Clwydyfagwr Colliery, Merthyr Tydfil, in 1896; succeeded by R. Harris by 1907.

Mines operated

MineRegionYears
Clwydyfagwr Colliery Merthyr Tydfil 1896–1907

Record created: 16 September 2026 · Last researched: 16 September 2026

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