 He also rebuilt the late 15th century north range with an extra storey, and laid out a park around the castle, remnants of which remain.The next additions were carried out by John Leslie, 7th Earl of Rothes, who disputed the earldom of Leven with David Melville following the death of the second earl in 1664.Lord Rothes, with the aid of John Mylne junior, the king's master mason, built a grand stair linking the keep and north range, where previously a wooden bridge stood.