Phil Murphy has kindly been in contact to tell me that the shakehole where Grey Wife Sike ends was named "P1" by the Yorkshire Geological and Polytechnic Society when they did their classic water tracing programme on Ingleborough in the late 19th Century. They also successfully traced it to Moses Well ("S7") in the bottom of the Clapdale valley.This makes it all the more curious that the course of Grey Wife Sike was clearly deflected so it ended at the P1 shakehole. (I think GWS was dug before the YGPS did their dye test though; perhaps it was just assumed that the P1 sink went elsewhere before the YGPS work?)
Good point Chocolate Fireguard - maybe the YGPS did obtain their water that way.From the Google Earth image it certainly looks like GWS extended along the same trajectory beyond the point where it deviates to go to the P1 shakehole. Then again, if the YGPS just wanted to nab the water, wouldn't it have been easier to dig their diversion trench perpendicularly, rather than from further up the hillside?That mapping tool you gave the link to is extremely useful (thanks). I note that on the version which was surveyed in 1893 the downstream end of GWS does go to the P1 shakehole. That was before the YGPS work I think; if so, maybe the YGPS didn't alter the course of GWS after all?Your post above refers to a shooting hut - is that the one between the 1250 ft & 1300 ft contours (marked on the 1896 published map)? Or is it lower down and nearer to the P1 shakehole?Robert Scott - you must have been typing at the same time as me! P1 is definitely the shakehole which the present O.S. map shows the downstream end of GWS leading to (at SD73257125). The late 19th C YGPS map shows this clearly, with a drainage line running confidently from it straight to Moses Well. (Incidentally this is almost perfectly parallel with the line of the North Craven Fault, also shown on the same YGPS map.) It's a long way down the fell from the Newby Moss Pot / P2a / P2b group.
Post war, the government paid grants to try to make land like this useable for grazing and agriculture. Gamekeepers also did it to encourage Calluna dominance which is good for grouse. Might it be that they just wanted to drain a particular patch of ground into a convenient hole? Bog drainage ditches are normally in a curved "herringbone" shape.
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