From "The Derbyshire Caver" No 121, part of an article by John Barnatt and Dave Webb:
"In 1772 lead miners started driving what was then a ‘state of the art’ underground canal level, from the base of a shaft close to the bottom of Winnats Pass, to mineral veins to the south including Faucet Rake and New Rake beyond; both were intersected by natural caverns of the Speedwell System (Rieuwerts and Ford 1985). They already knew of the existence of these natural cave passages, as miners had entered them beforehand via both Pilkington’s Cavern and the Leviathan Pitch/Boulder Piles (Ford 1992; Nixon and Warriner 1997). Hence, the rough direction and depth at which to drive to intersect the main Speedwell streamway were known; the resulting canal would make extraction of the ore from depth a much easier proposition. This ambitious but ultimately financially unsuccessful project was probably completed in 1782, one year after breaking into the streamway. At the time of the breakthrough two miners explored the stream way to Main Rising. They climbed into the nearby entrance to Cliff Passage and commemorated this momentous breakthrough, inscribing their initials and the well-known ‘A Health to All Mines and Mentainers of Mines’ together with a drawing of a bottle and glass, and probably a second crude drawing of a boat (possibly added later). This is one of the most interesting and historically significant examples of miner’s graffiti in the Peak District."
The article also has a list of other inscriptions at the same place.