She rouses herself, however, determined to go on with her part. Every movement is closely watched by one of the witnesses—a woman with glittering eye and pallid cheek. When the bride's repugnance seemed about to overmaster her, and perhaps result in a swoon, this woman gave utterance to a sigh almost of despair and with panting breath and steadfast gaze anxiously watched and waited for the end of the exciting drama. The grave clergyman notices the bride's heroic efforts to restrain her agitation, and the ceremony proceeds. At length the solemn sentence is uttered which proclaims the masked couple man and wife. Then there is a great surprise for the spectators. As they behold the bride and groom, now unmasked, there is a stare of wonder in every face, and expressions of intense amazement are heard on all sides. Then it dawns upon the witnesses that the principal actors in the play are not the persons first chosen to represent the parts of the bride and groom.Why was a change made? What means the unannounced substitution of other actors in the exciting play? Ask the woman who caused the change--the woman who, with pallid cheek and glittering eye, had intently watched every movement of the apparently reluctant bride, evidently fearing the failure of the play upon which she had set her heart. It became painfully evident that the play was not ended yet, and some there present had reason to believe that it was likely to end in a tragedy. Now let us portray the events which preceded the masked bridal. CHAPTER I. TWO UNEXPECTED VISITORS. It was a cold, raw night in December, and the streets of New York city, despite their myriads of electric lights and gayly illuminated shop windows, were dismal and forlorn beyond description. The sky was leaden. A piercing wind was blowing up from the East River, and great flakes of snow were beginning to fall when, out of the darkness of a side street, there came the slight, graceful figure of a young girl, who, crossing Broadway, glided into the glare of the great arclight that was stationed directly opposite a pawnbroker's shop. She halted a moment just outside the door, one slender, shabbily-gloved hand resting irresolutely upon its polished knob, while an expression of mingled pain and disgust swept over her pale but singularly beautiful face. Presently, however, she straightened herself,