Hi Keith,
The marker near the motorway bridge on Saw Pit Lane is the location I have been given by a couple of people for the Drum & Monkey. It's also shown on the 1879 O/S maps as an abandoned colliery site not far from Marlpits Cottages (which is now under Tibshelf Services).
The locals all seem to think that it was separate to Diminsdale, though owned by the Chambers family and abandoned much earlier, possibly around 1840.
Aaron