On the evening of the day that had witnessed the envoy's defeat a masked ball was held, and the halls and gardens of the Vistula Palace were alive with gay revellers.

The centre of attraction was the spacious ball-room, where, beneath golden chandeliers that shed a radiance brighter than that of the sun, moved a crowd of Czernova's noblest and fairest.

The picturesque character of the dresses, the glow of color, the perfume of flowers, the gayety of the music, and the rippling laughter of fair masqueraders, formed a scene bewildering and intoxicating to the senses.

Amid this throng moved Paul Woodville in eager quest of the masked Barbara, who had refrained from telling him what costume she would assume. If he were a true lover he ought to be able to penetrate her disguise, she had playfully observed, and if he failed to discover her, why then the want of discernment on his part should bring its own punishment.

As he moved here and there witching glances were cast at him by masked ladies, for as regards figure and dress, few were more qualified than Paul to serve as a cavalier.

He had adopted the old Polish costume. With a four-cornered cap adorned by a waving heron plume, silken "contuschi" that fell in graceful folds around well-shaped limbs clad in tight silk hose, short boots decorated with gold lace, and a curved, diamond-hilted sabre swinging lightly by his side, Paul walked among the men present, the noblest figure of them all; and many whispering inquiries were interchanged as to his identity.

At length Paul caught sight of a graceful figure, robed in the silver-gray habit of a nun, standing solitary by the entrance of a corridor leading from the ball-room.

He watched and saw her with a pretty shake of her head repel in silence the addresses of three cavaliers in succession.

As Paul drew near, the lady suddenly turned her head and flashed a glance at him through the eyelet-holes of her black silk vizard. That glance was sufficient, and in another moment he was by her side.