A declaration against Prince Rupert, or, An argument, whereby it appears that Prince Rupert and all that joyne with him in this unnaturall war against the Parliament, are guilty of high-treason : with an exposition of the stat. of II. Hen. 7, whereby it appeares, that those who follow the advice and imployment of the Parliament, are freed from treason or any other offence concerning their particular actions in the service /