| 41. | Heavy iron doors were hung across the tunnel adits during the summer of 1975.
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| 42. | The deeper the level of drainage, the longer the adit had to be.
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| 43. | The deeper the dewatering level lay, the longer these adits needed to be.
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| 44. | The main adit was blocked by a grill in 2009, for safety reasons.
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| 45. | A third adit was constructed at mill level.
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| 46. | It has a 58 m lower level and replaced the older adit in 1754.
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| 47. | A record 77 students completed the ADIT qualification during the June 2015 exam session.
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| 48. | The mines extended nearly through four adits.
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| 49. | Development at that time included several to adits, and three shafts, to deep.
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| 50. | The mine buildings have disappeared but an adit can still be seen in Mullion Cove.
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