The Feuds of the Clans, by Alexander MacGregor, [1907], at sacred-texts.com

The Conflict of Ruaig-Shansaid.

The year of God 1437, Neil Wasse Mackay, after his release out of tine Bass, entered Caithness with all hostility, and spoiled all that country. He skirmished with some of the inhabitants of that province at a place called Sanset, where he overthrew them, with slaughter on either side. This conflict was called Ruaighanset, that is, the Chase at Sanset. Shortly thereafter Neil Wasse died.