The true coppy of a letter, lately written, by a Lord of this realme, unto a Member of the House of Peeres: : shewing the reasons and grounds of his former adheherence [sic] unto, and his late desertion of this Parliament; and of his present undertaking with that party now in arms for his Majesty. Published for the satisfaction of such as desire a briefe and judicious discovery of the causes of the high proceedings of this Parliament, and of this noble lords dislike of them.