Title: Two letters from Mr. Mountagu to the Ld Treasurer; one of the 11th, the other of the 18th of Jan. 1677/8 which were read in the House of Commons. Together with the Lord Treasurer's speech in the House of Peers, upon an impeachment of high treason, &c. brought up against his Lordship by the House of Commons, Decem. 23. 1678