"Barbara was decidedly an anti-Muscovite," thought Paul.

"But the greatest change—"

"Yes, the greatest change—?" repeated Paul, observing that the other had stopped short in his utterance with the air of one about to be betrayed into an imprudent statement.

As Trevisa did not reply, Paul drew a bow at a venture.

"The princess was reared in the Greek faith, I am given to understand? Humph! what was Prince Thaddeus thinking of when he placed his daughter under the tutelage of Cardinal Ravenna? One can guess the result. The princess went away a Greek, and came back a Catholic. Is it not so?"

"Hush!" muttered Trevisa, glancing around in some trepidation. "Yes, that is so. You have hit on a state secret, communicated only to her cabinet, and to me—her secretary. But, Paul, breathe not a word of this to any one, for the knowledge of it would shake her throne, and—"

He paused. There was a sudden commotion in the street below. Pedestrians had stopped in their walk, and were crowding to the edge of the pavement with their faces all set in one direction, whence came the distant sound of cheering and of clapping hands. The applause rolled in crescendo along the boulevards, advancing nearer each moment to the two friends.

"Here comes the princess!" cried Trevisa, springing to his feet. Paul felt his heart beating as it had never beat before when he turned his eyes towards the approaching cavalcade.

First came a detachment of Polish uhlans, their burnished lances glittering in the morning sunshine, and the points decorated with black pennons that fluttered in the breeze.

The handsome regimentals of this corps du garde, the Blue Legion, promptly drew from Paul the remark,—