Unknown Grave

On a small country road along Loch Earn in Scotland is this old tomb shaped rock standing on the side of the road. This is clearly an old grave since it has writting on it (very hard to read).

What I could read from the stone was: that a family was slaughterd near the site and later buried, this was sometime in the 17th century. The stone isn't in the location of the bodies as it was later installed and no one really knows where the bodies are, but they do know that they are in the area.

If I find further information about this I will update this map.