This is the walk as described by Tyrone Thomas.
" A well defined track leads up through the cliff lines from 760m high [on] Westrope Road... Once on the plateau, a delightful alpine plain and vast moss beds can be explored. The aim is to climb to the summit of an un-named rocky crag 1190m high, some 2km north-north-west of [the] famous Mother Cummings Peak. ...Mother Cummings Peak dominates the view south-east from the top.
...take a 2 Km return side trip south-south-east. There is no track to follow so it would be unwise to take the trip in fog. The aim is to explore the mossy plain..."
I know that isn't much help in your quest, but he doesn't seem to have actually walked to Mother Cummings Peak. He climbed the north peak and "explored" the plateau.