I have looked at the Aerial pic from Chris and we do now have definate route and lets hope some great walks in prospect.
The route North of the farm is on the early OS maps which i will photograph and send. I also have my photos of Sheila Norris's Chatsworth estate maps.
Beyond Longcroft farm the route was opencasted away but I am convinced it went to the pits in the bottom of the vale near the golf course as I have located an embanked bridge over the stream allowing access to those collieries.
The slack under your field being very coal rich is a good pointer to an old old coal working as they chucked the small stuff away.... big lumps being only really saleable back then. Medium grade stuff usually got sold off locally in small lots or went in the engine boilers of the pit that mined it. Even then huge amounts of nutty slack ended up as spoil. If yo go to golden valley above the Cromford canal tunnel, the spoil is virtually all coal and the hillocks just grey in winter.
Will PM you my own email and then you can mail me and I will cross copy you some stuff.
Regards ICLOK
Interestingly a section of another tramway route Sth of the Canal on the other side of the valley to Morley Park has a section of good trackbed and embankment, probably pretty typical of what the Pentrich Tramway looked like.
Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!