Recommend Caves of the Peak District by the late, great, John Beck. It has virtually all the caves and mines of Stoney Middleton - unless you know better! (like me!
)
Anyways, If you park opposite the garage and walk up the road, take the right turn up towards Eyam, hidden about 150m or so up the road is the electricity substation on the right.
It is possible to park here, but DO NOT block the substation gates - you may be towed away, this location has been a hotspot for car breakins in the past, but I used it a lot about 4 or 5 years ago whilst digging and never had a problem. Which is tempting fate..... :spank:
Anyway, virtually opposite the substation is a path leading upwards, follow this and you will come to Carlswark Cavern Eyam shaft, the path then winds left and up, then doglegs back to Merlin adit entrance.
However, you have a choice:
(i) Go in via Carlswark Gin entrance, walk/grovel all the way through to Northwest passage, turn left and find bottom of shaft mentioned above, you then go past bottom of shaft through a low crawl into a chamber with a big heap of spoil in the middle, on the other side is another low thrutch which brings you into the Carlswark side of Gimli's Dream
(ii) Drop Eyam shaft and then as above
(iii) Into Merlins, along passage to T Junction, right, cross over 2 blind shafts and rig 3rd one with ladder and drop shaft to attain streamway and Gimli's.
Martin