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Sir George Denys

Owner of the mining rights across much of upper Swaledale who commissioned Sir Francis Level in 1864, named it after his son Francis, and in 1870 introduced Yorkshire's first compressed-air rock drills to speed its driving.

Mines operated

MineRegionYears
Sir Francis Level (Lownathwaite Mine) North Yorkshire 1864–1882

Record created: 22 August 2026 · Last researched: 22 August 2026

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