By the Honourable James Hamilton, Esq; lieutenant governor, and commander in chief, of the province of Pennsylvania, and counties of Newcastle, Kent and Sussex, on Delaware, a proclamation : Whereas by an act of Parliament, passed in the twenty-third year of His Majesty's reign, entituled, An act to encourage the importation of pig and bar iron from His Majesty's colonies in America ... Given under my hand, and the great seal of the province of Pennsylvania, at Philadelphia, this sixteenth day of August ... 1750.