A letter sent from the marquess of Argyle to the King of Scots; concerning the raising of a new army against the English; and his desires and proposals touching the same. Also, his declaration to the people, and his summons to the gentry in the North; with the rising of the Highlanders and Redshanks; their falling upon the Parliaments forces, and the event and success thereof. Likewise, the manner how they fortifie the hills and mountains; and the strange engines of war which they have planted.