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Rogpow: Wheal Grenville New Stamps
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Rogpow: Crankshaft loading, Wheal Grenville New Stamps.
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Rogpow: Auxiliary bob plinth, Wheal Grenville New Stamps.
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Rogpow: Wheal Grenville New Stamps Engine House
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Rogpow: Arsenic stack, Wheal Grenville
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Rogpow: Wheal Grenville, Troon, Cornwall