A Tory, if not a Jacobite, Morice contributed to the election fund raised by the Cornish Tories in 1741.
In 1744 Morice came into collision with the Duke of Bedford over hunting rights near Werrington. He wrote to the Duke: ‘You seem to treat me rather like one of your meanest vassals and dependants than a gentleman’, but ‘though I am not adorned with those gawdy titles you are nor master of such large possessions yet I have as quick a sense of an injury offered to me as you can have and have as much spirit and inclination to resent it’.
