This arrangement proved fortunate for Mariposilla. She forgot her first slight embarrassment entirely, as she glided happily among the less exclusive throng, who good-naturedly jostled her as she passed in the dance.

Sidney had assumed entire charge of her. He had arranged her programme with great consideration, interspersing his own name freely between the names of the most desirable men in the room; while he reserved for himself the privilege of escorting her to the refreshment room, preparatory to the cotillion.

The evening from its beginning appeared auspicious for Mariposilla. Between dances the child flitted to my side like a happy bird.

"It is most grand, Señora!" she whispered, as Sidney drew her away for a waltz.

During refreshments, I noticed that Mrs. Wilbur was both fascinated and annoyed at the sensation the girl was producing. Where would the matter end? I asked myself.

Even in the midst of Mariposilla's apparent success, I felt my heart sinking with apprehension. "Why," I questioned, "Why did I let her come?"

The dancers were rapidly leaving the supper room, and when I looked for Mariposilla, she, too, had disappeared. Thinking that she had gone below into the ball-room, I followed hastily; but she was not there. Excusing myself to Mrs. Sanderson, upon the plea that I must peep at Marjorie, I ran hastily above, hoping to find my charge in one of the reception rooms. Faithfully I searched the parlors and corridors, and later the verandas, in vain, for a trace of the truants, so successfully escaping me.

There was yet Mrs. Sanderson's sitting-room. I must pass it on the way to Marjorie.

I hastily ascended the stairs, contemplating, as I flew along the hall, my chances of interrupting a tête-a-tête.