By the Honourable Spencer Phips, Esq; ... A proclamation : His majesty's service requiring the utmost precaution in all our measures, at this important and critical conjuncture; and it being judged necessary in order to facilitate and render more effectual the operations of the ensuing campaign, that an embargo should be laid on all ships and vessels within the several ports of this province ... Given at the Council-chamber in Boston, the ninth day of March, 1757 ...