A form of common prayer, to be used upon the thirtieth of January, being the anniversary day, appointed by act of Parliament for fasting and humiliation : to implore the mercy of God, that neither the guilt of that sacred and innocent blood, nor those other sins by which God was provoked to deliver up both us and our King, into the hands of cruel and unreasonable men, may at any time hereafter be visited upon us or our posterity.