The letter he still held in his hand had worked upon him like a malevolent charm, hollowing his cheek and wrinkling his brow. For nearly half an hour he continued his monotonous walk, alternately slackening and accelerating his pace. At times he would come to a momentary halt, with the absent air of one absorbed in working out a puzzling problem. At last he opened a secretaire, touched a spring which made a secret drawer fly open, placed in this drawer the letter that had so greatly disturbed him, closed the desk, and, lighting a taper, took the direction of his wife's sitting-room, in the opposite wing of the hotel. Madame Fatello and Mademoiselle Sebastiana Gonfalon were equipped for the ball and in readiness to depart. Between the two sisters, in whose ages there was a difference of two years, so strong a resemblance existed that they frequently were taken for twins. Exactly of the same stature, they had the same large dark eyes, abundant hair, and brown tint of skin, and the same mouth, not very small, but beautiful in form, and adorned with teeth of dazzling whiteness. Both had the grace and fascination for which their countrywomen are renowned. The chief difference between them was in expression. Catalina was the more serious of the two: her gravity sometimes verged upon sullenness, and this was especially observable since she had been compelled to a marriage repugnant to her feelings, but which she had lacked energy and courage to resist. Her father would have found it a far less easy task to force Sebastiana to a union opposed to her inclinations. As high-spirited as her sister was irresolute, Mademoiselle Gonfalon was one of those persons whose obstinacy is increased by every attempt at coercion. Laughing and lively amidst all her gay coquetries, there still was a decision in her classically moulded chin and slightly compressed lip, and a something clandestine but resolute in her eye, which a physiognomist would have interpreted as denoting a degree of intelligence and a passionate strength of character denied by nature to her feebler sister. Upon this evening, however, it might have been thought the two young women had exchanged characters. Sebastiana, in general all smiles and sprightliness, was thoughtful and preoccupied, almost anxious; whilst the listless and melancholy Catalina had an unusual appearance of gaiety and animation. Her cheek was flushed, her eyes were brilliant, and she looked repeatedly at a jewelled bijou-watch, as though she would fain have advanced the hour at which she could with propriety make her entrance into Madame de M----'s saloons. The door opened and Fatello came in. By a powerful exertion of that self-command which he possessed in no ordinary degree, he had banished from his countenance nearly every trace of recent agitation. He was perhaps a shade paler than usual, but his brow was unclouded, and his uncouth countenance was lighted up by the most agreeable smile it could assume.