By His Excellency William Shirley, Esq ; captain-general and governour in chief in and over his Majesty's province of the Massachusetts-Bay ... A proclamation for a publick fast : ... Thursday the twenty-ninth day of April instant ... Given at the Council-chamber in Boston, the ninth day of April, 1756 . (Printed by John Draper, printer to his excellency the governour and Council, 1756)