| 21. | He worked at the Witwatersrand Deep Mine on the Transvaal Reef for several years.
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| 22. | As with many deep mines, compressed air and electricity were supplied from the surface.
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| 23. | Many business closed as deep mining declined, and increasing numbers of houses stood vacant.
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| 24. | 250th Tunnelling Company also started the deep mine under the German positions at Spanbroekmolen.
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| 25. | Shortly after the flooding, Scottish Coal ( Deep Mine ) Limited, went into receivership.
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| 26. | This was combined with a deep mining disaster when one of the local mines collapsed.
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| 27. | There are no deep mines operating in Van Lear proper, although some mines operate nearby.
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| 28. | In December 1915, 250th Tunnelling Company began work on the deep mine at Petit Bois.
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| 29. | The deep mine, one of the last surviving in France, was closed down in 2003.
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| 30. | Most of the deep mines ceased operation by 1960.
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