Complex sentence: The Earl of Caithness met with the Gordon Earls of Huntly and Sutherland but MacKay did not and was denouunced as a rebel by Sutherland.
Split into simpler sentences: The Earl of Caithness met with the Gordon Earls of huntly and Sutherland but MacKay did not. MacKay was denouunced as a rebel by Sutherland.