"punish the innocent beyond that third or fourth generation..."See in text(Chapter II)
This refers to the biblical book of Exodus 20:5, which reads, in part, "I, the Lord your God, am a jealous God, visiting the iniquity of the fathers on the children, on the third and the fourth generations. . . ."
History of the Rebellion and Civil Wars in England Begun in the Year 1641 was written by Clarendon in 1667 after he fell out of favor in the court of Charles II (not published until 1702). It is considered one of the most important accounts of England's civil war.