The long kept secret that had troubled Nathalie so much at first was out at last, and she and Helen, who had been told about that when her friend’s silence was first broken as far as she was concerned, broke into prolonged laughter at the richness of the joke.

“A cockatoo?” exclaimed Grace incredulously, and then annoyed at the girls’ merriment she added crossly, “Oh, I do wish you would explain what is so funny, I think it real mean of you both to laugh that way!”

“Yes, it is mean,” added Nathalie, stifling her laughter as she saw the irate expression on her friend’s face. “But, Grace, it was funny. I would have told you all about it before—that is how I found out—only I had sworn not to tell. But if you will promise not to reveal what I am going to tell you—honor bright—” this in answer to the girl’s nod of assent, “I will tell you the mystery of the gray house!”

It was not long now before Grace heard the long story of how Nathalie had come to go to the house, how she had found out about the cockatoo, the star part she had played with the princess, and the many other happenings that had taken place within the last few weeks.

“But is the poor thing such a terrible monster?” demanded Grace in ready sympathy.

“A monster?” ejaculated Nathalie in amazement. “Who said she was a monster?”

“Why, don’t you remember? Edith—”

“Now, see here,” exclaimed Nathalie stamping her feet angrily, “don’t tell me another word of what the Sport says. I am just beginning to hate that girl, she is always saying and doing things she has no—” She stopped suddenly as it came to her in a conscience-stricken flash that Pioneers were never to say evil of any one.

Helen, seeing the strange expression in her eyes and noticing how her color was coming and going in flashes, cried, “Oh, Nathalie, what is it?”

“It is nothing,” replied the girl quickly in a choked voice, “I just stopped—because—well, I remembered that one of the Pioneer laws is not to speak evil of any one. I’m going to keep mum after this, but that girl,” her eyes shadowed again, “does provoke me so!”