As a political adviser of the king Williams consistently counselled moderation and compromise between the unqualified assertion of the royal prerogative and the puritan views of popular liberties which were.
John Penry, the Puritan martyr, was born at Cefn-brith in this parish.
Later the place was abandoned, and in 1634 a Puritan settlement was made here.
While he maintained the puritan doctrines as a whole, the special point of his attack was the Episcopacy.
His family seems to have been strongly Puritan and was related to many of those Buckinghamshire families who were prominent in the parliamentary party.