Ding Dong Mine house, 1958

I found on a website about Cornish mines that Ding Dong's Greenburrow section was also called Wheal Malkin or Wheal Malkin was it? Which could be a seperate part of the mine. There is a bell in Madron church from the mine. Perhaps the whistle or hooter wasn't around at the earlier working of the mine.

Oh, also I think this mine is where Trevithick put his first high pressure pump engine. I can only think fathoms (6 ft) are used for convenience, less than this is the yard (3 ft) or the foot. Very deep mines would need lots of numbers. Also a lot of Cornish miners were also seamen and the fathom would be familiar to them even tho a Cornish fathom used in Newlyn I heard was five feet!

This area of the mine was indeed once part of Wheal Malkin, one of many smaller workings which eventually became amalgamated into one large sett.
I believe the shaft at which Trevithick installed his engine (which had to be altered by another engineer, Edward 'Ned' Bull, as it infringed Boulton and Watt's patent) was Ding Dong shaft itself, still open but nowadays hidden among a profusion of dense blackthorn and rhododendron.