Ever and anon the moon shines out from amid the fast-flying clouds; then, as though it has seen enough, hides itself again under the ghostly mist. The sighing of the wind through the forest is like the trembling of fever-stricken nature. In the stillness of night, through the pathless forest, rides a troop of horsemen. Their little long-maned horses sniff their way with low, sunk necks; by the shaggy fur caps of their riders, and their long lances hanging far back at their sides, they are to be recognized as a party of Don Cossacks.