Title: Tvvo Letters VVrit By Lievt. Col. John Lilburne, Prerogative pri- soner in the Tower of London, to Col. Henry Mar- tin, a Member of the House of Commons, upon the 13. and 15 of September. 1647 the contents of which are very necessary to be taken notice of by all just men in the Present age. Vnto which is annexed some other Letters of great concernment