Sentence:  For granting even that Religion were dead; that it had died, half-centuries ago, with unutterable Dubois; or emigrated lately, to Alsace, with Necklace-Cardinal Rohan; or that it now walked as goblin <WSD>revenant</WSD> with Bishop Talleyrand of Autun; yet does not the Shadow of Religion, the Cant of Religion, still linger? 
Meaning of the word marked with <WSD> tags:  A supernatural being that returns from the dead; a zombie or ghost.