I found this in the Glebe Cottage Index - as P9 is mentioned separately (as 'unnamed', is it possible that this is Christmas Hole that's being referred to here? Ah - it's the same reference on the registry so it must be! There's a copy in the Chapel Library - who knows, maybe even a survey. But we can't get in!
B.S.A. Cave Science. Vol.2. No. 11
"The Peak Fault Swallets". P.1. Perryfoot. P.2. Sheepwash. P.3. Gautries Hole.
P.4 - 5. Unamed. P.6. Little Bull Pit. P.7-8-9-11-13. Unamed.
P.10. Snelslow Swallet. P.12. Giants Hole. Christmas Cave & Mine
Shaft on Middle Hill. Plan and Sections. L.S.Salmon & G.Boldock.pp.118 - 123.