Complex sentence: In February 1585 they came to London, and cleared themselves of the accusation of plotting against James's life; a plan was prepared for their restoration and for the overthrow of James Stewart, earl of Arran.
Split into simpler sentences: In February 1585 they came to London, and cleared themselves of the accusation of plotting against James's life. A plan was then prepared for their restoration and for the overthrow of James Stewart, Earl of Arran.