And here we may be forgiven for a short digression on the subject of the dramatic _Materia Medica_, and _poison-ology_. The sleeping draughts of the stage are, for example, generally speaking, uncommon specimens of chemical perfection. When taken--even if the patient be ever so well shaken--nothing on earth, or on the stage, can wake him after the cue for his going to sleep, and before the cue for his getting up, have been given; while it never allows him to dose an instant longer than the plot of the piece requires. Then as to poisons; there are some which kill the taker dead on the spot, like a fly in a bottle of prussic acid; others, which--swallowed with a sort of time-bargain--are warranted to do the business within a few seconds of so many hours hence; others again there are (particularly adapted for villains) that cause the most incessant torment, which nothing can relieve but death; a fourth compound (always administered to such characters as _Nina Sforza_) are peculiarly mild in their operation--no stomach-ache--no contortions--but still effectual. The contents of the phial given to _Nina_ by _Spinola_ are compounded of the second and fourth of these _formulae_. The drink, though deadly, is guaranteed to be a mild, rather-pleasant-than-otherwise poison, warranted to operate at a given hour; one calculated to allow the heroine plenty of time to die, and to make her go off in great physical comfort. _Nina_ has taken the poison; but, having a peculiar desire to die at home, orders a "trusty page" to provide horses for herself and attendant secretly, at the northern gate, that she may return to her native Venice. With this determination we lose sight of her. _Doria_ is aroused by a hunting-party who have risen so early that they seem to have forgotten to take off their nightcaps, to which the Italian hood, as worn by the Haymarket hunters, bears an obstinate resemblance. The Prince discovers his wife has fled, and orders his _chasseurs_ to divert their attention from the game they had purposed to ride to cover for, and to hunt up the missing _Nina_. "In the deep recesses of a wood" _Spinola_ and _Doria_ meet, the latter having, by some instinct, found out his _pseudo_-friend's treachery; of course they fight: _Doria_ falls; but _Spinola_ is too great a glutton in revenge to kill him till he knows of his wife's death, so, after gloating over his prostrate enemy, and poking him about with his rapier for several minutes, all he does is to steal his sword; this being found upon him by some of the hunters, who meet him quite by accident, they suppose he has killed _Doria_, and so kill him. Thus, _Spinola_ being disposed of, there are only two more that are left to die.