I always approach Eyam Moor III from the Leam side of the Moor. There is a space on the verge, near Leam & the footpath that takes you up onto the moor. (SK232794). When you reach the drystone wall, look left, the circle is near the corner of the wall 200m away.
The 4 upright stones are covered with bilberry and there are a further 2 laying in the heather. In the centre is a ruined oval cairn, with a large trench cut into it.