The True copy of a letter sent to Mr. Caryl in behalf of the poor prisoners and citizens of London : which was by him communicated to the members of Parliament, and the rest of his auditory at Christ-Churh on Thursday, Octob. 6, being the day appointed for a solemn thanksgiving : with Mr. Caryls commemoration and exhortation for the resotring such to liberty, who have a long time lain under the common and fatal calamity of grates and prisons : as also that they would speedily be pleased to shew mercy to the oppressed, and to give relief to the distressed, that so none may have cause to say, whilest great men are feasting the poor lye aperishing.