Driving north out of Sannox, you pass the old Sannox Congregational church on a right hand bend - turn into this small track and park by the old (and now closed) church.
Standing proudly in the gardens of Dundarragh Cottage at Sannox, this stone is a beaut. As the cottage is a holiday home and was unoccupied, we had a cheeky wander round. The stone which stands across the road (up past the golf club) is very similar - but some distance - so it is possible that one or both may have been moved? Or maybe they aren't linked? Who knows?
The last time that Arran saw an enemy on its soil, was during the temporary occupation of Scotland by the usurper Oliver Cromwell. He placed a garrison of eighty men in Brodick Castle [..] His troops fell victims to the angry passions of the Highlanders. It would appear that they used some improper liberties with the females of the island, and otherwise conducted themselves with the usual license of conquerors. The Highlanders, fired by such insults, watched their opportunity for revenge; and, taking the Englishmen by surprise when out on a foraging excursion, they put them all to the sword. The last of the party that fell was dragged forth from his concealment under a large stone near the road side at Sannox, which still, from its remarkable appearance, attracts the notice of visitors.
I'm sure he wasn't, but who wants to spoil a good story. From p 22 of the Buteshire section of the New Statistical Account of Scotland (v5 - 1845).