What are two metaphors used by Henry

Answer: "the song of that siren till she transforms us into beasts"

"are we disposed to be of the numbers of those who, having eyes, see not, and, having ears, hear not."

He introduces the metaphor when he says, "They are sent over to bind and rivet upon us those chains which the British ministry have been so long forging." The second reference to enslavement is found in these lines: "There is no retreat but in submission and slavery! Our chains are forged!