Although always much troubled by underground water, the mine was at times highly profitable, and it was the largest single producer of copper ore in Cornwall.

[11] The Parys Mountain ore was mined out by about 1800, and the price of copper soon rose again, reaching a high of £138 per ton in 1805.

[15] In 1824 Taylor built the Redruth and Chasewater Railway to transport the ore from this mine (and other ones nearby) to the port of Devoran.

[16] One of the youngest children recorded as working down a Cornish mine was killed near the 120 fathoms (220 m) level in November 1831.

[17] Some of the lower workings were extremely hot: for instance the air temperature at the 294 fathom (538 m) level was recorded at 96 °F (36 °C), increasing to 108 °F (42 °C) in places, and the water that collected at the bottom of Davey's shaft was 92.5 °F (33.6 °C)—the men working in the lower levels used this to cool themselves!

[20] Such was its fame that many other mines were opened using the words "Consolidated" or "Consols" in their names, hoping to profit by association with the success story.

[21] By the 1850s it was clear that the copper mines in the west of Cornwall were becoming exhausted and this together with the start of foreign production (from Chile, for instance) led to a spate of closures or further mergers to reduce running costs.