Four historians have written books about the McNaughtons: V.V.McNitt, Angus Macnaghten, Duncan McNaughton, and Matthew Cock. Of these four authors none of them considered the fact that the chiefs of Dunderave may have returned to the Catholic Faith for the sake of their King. Campbell of Argyll was the head of the Presbyterian Church in Argyll. Imagine John MacNauchtan going to the same church with the Campbell clan after giving the testimony in 1660 that sent King Campbell to the butcher block -- or 25 years later after raiding the Campbell lands and stealing all their cattle. The McNaughtons of Dunderave simply could not have been Presbyterians. That leaves either Episcopalean or Catholic. To have endeared the King to the point where where the King called them his beloved McNaughtons and allowed Sir Alexander McNaughton to be buried in the Chapel Royal indicates clearly to me that they were Catholic. The four McNaughton historians have not considered this possibility. So they have not considered the following information either in their evaluations as to how the McNaughtons lost Dunderave and all their lands.
After the Boyne all Catholics were made outlaws and over 1000 of them were executed or banished as slaves to the colonies. In 1708 laws were passed making it impossible for Catholics to collect lawful debts in the courts. McNaughtons had many properties which were paying rent, but they could not get to the money to pay bills, so lost everything. If, on top of all their other problems, they were still trying to be faithful to Catholicism this fact would go a long way in explaining why it was they could not pay their debts and retain their castle and lands.