Disbound printed booklet entitled “The Humble Additional and Explanatory Petition and Advice, of the Knights, Citizens, and Burgesses now assembled in the Parliament of this Commonwealth,” eight pages (numbered 23-30) plus title page, 7 x 10.25, printed in London by Henry Hills and John Field, Printers to His Highness, 1657. The significant document amends and clarifies several articles from the previously issued ‘Humble Petition and Advice,’ which codified the English constitution. The document concludes: “Which Petition being presented the 26th day of June, 1657. His Highness answer thereunto was read by the Clerk of the Parliament in these words, The Lord Protector doth consent.” In very good to fine condition, with scattered light foxing, light dampstaining to the lower half, and the cover sheet detached but present.