Sentence:  See what contempt is fallen on human kind; ... See Bedlam's <WSD>closeted</WSD> and handcuff'd charge / Surpass'd in frenzy by the mad at large;<!--is this a verb or an adjective?--> 
Meaning of the word marked with <WSD> tags:  To shut up in, or as in, a closet for concealment or confinement.