He left for the continent in 1601, travelling for his education to Paris, Orléans, Tours and Saumur, where he stayed with Philippe de Mornay.
He ratified his father's building of Marischal College by a charter of 1 October 1623 and attended James VI and I's funeral on 5 May 1625 at Westminster Abbey.
He also joined the Scottish council of war on 12 July 1626 and was put in command of three ships to transport troops to aid Christian IV of Denmark, Charles I's uncle.
He received Charles I on his entry into Edinburgh in 1633 after his coronation and then in 1634 fitted out another fleet, which he sent to the assistance of Władysław IV Vasa.
[3] Nine of their children survived him: After his death, his widow, Mary Erskine married Patrick Maule, 1st Earl of Panmure.