and i do hereby caution and forbid the ships and vessels of all and every nation in amity and peace with the united states from entering or attempting to enter, or from coming or attempting to come out of, any of the said ports, harbors, bays, creeks, rivers, inlets, outlets, islands, or seacoast under any pretense whatsoever. and that no person may plead ignorance of this, my proclamation, i have ordered the same to be made public in england.