Purple also came to represent spirituality and holiness because the ancient Emperor's kings and queens that wore the color were often thought of as gods or descendants of the gods.
Island foxes are descendants of mainland gray foxes, but have grown smaller over thousands of years to adapt to the limited resources of their island homes.
This is explained away by true believers thus: either the third brother's descendants do not know where their Cloak came from, or they know and are determined to show their ancestor's wisdom by not trumpeting the fact.
Because this historical language was never written down, we can only reconstruct by comparing its descendants which is possible thanks to the consistency of the changes.
The witches predict that he will become Thane of Cawdor and King of Scotland and that the descendants of his friend Banquo, will become kings –what a prediction!