What allusion does the author use in his description of Marley being dead?

I believe Dickens uses Shakespeare's Hamlet as an allusion:

"If we were not perfectly convinced that Hamlet's Father died before the play began, there would be nothing more remarkable in his taking a stroll at night, in an easterly wind, upon his own ramparts, than there woud be in any other middle-aged gentleman rashly turning out after dark in a breezy spot-- say St. Paul's Cathedral for instance - literally to astonish his son's weak mind"