The room is red and black (black, itself, is another popular Poe symbol -- we see it in "The Raven" with the black raven and "The Black Cat" with the titular cats), and it too symbolizes death. The clock, here, also symbolizes mortality and reminds people of their own eventual deaths, which are inescapable.
This is what i think it is necessary it is to held that a bill of rights was necessary to safeguard individual liberty. T is o not give the government but we the people to have the power. It is necessary for us to have the bill of rights