England's warning-piece : shewing the supreme and indispensable authority of the laws of God; and the impiety, and fatal consequences of screening, and abetting murder. A sermon occasioned by the untimely death of Mr. William Allen the younger, who was most inhumanly murdered near his father's house, by an arbitrary military power, on Tuesday, the tenth of May, 1768. Preached at the request of his friends, in the Parish Church of Newington-Butts, and published in compliance with the demand of the public. By John Free, D.D. - Free, John, (Printed for J. Greenleaf, and sold at the new printing-office, in Hanover-Street,, 1773)