which must link to as yet unseen by human eyes passage and then to who knows where.
I've wondered where the choke at the end of the north passage goes, looking at the surveys it points roughly the same direction as the end of Urchin and Olympic Stroll
I also seem to remember being told about a phreatic tube heading south from Arbour Low mine, although I never saw it. I guess this has now been lost to infilling.
The workings have been inaccessible for many, many years - Richard Shaw went down there in 1980/81 ten years after mining ceased but he makes no mention of any significant natural down there: https://pdmhs.co.uk/MiningHistory/Bulletin%2015-1%20-%20Arbor%20Low%20Calcite%20Mine,%20Youlgreave,%20Derbyshire.pdf I can ask him if he remembers seeing any phreatic tubes but if it was in one of the lowest levels that had already been filled with tailings by 1980 he won't have seen it, and even if he did his memory of it after 40 years may be a bit hazy!
I never saw the tube but I'm sure it was someone from Orpheus who told me about it around that time.
I had a real fright one day when exploring one of the open stopes that still there at the time. The floor beneath me gave way and I started falling for what seemed like a long time but was actually only the depth of a rusty oil drum.
Really impressive mine,The effort gone into the digs is cool to see.
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