Quite easy to access this one, it's about 1/2 a mile off the main road from Tavistock to Princetown. If you don't want to walk up the hill from Merrivale, drive on up the hill from Merrivale towards Princetown and you'll find a car park on your right where there are some trees and walled sheep pens. Walk down to the leat and follow it back towards Merrivale for half a mile or more and you'll see the stone row to your left