A declaration of the Marquesse of Argyle, : with the rest of the Lords, and others of the Estates of the kingdom of Scotland, concerning the Kings Maiesty, and the treaty; and their desires to the Parliament of England. Also their propositions to Lieutenant-Generall Cromwell, and the army in England. With a discovery of the late designe put in practice by some English and Scots against both kingdoms, and their further advice thereupon.