Miss Campbell’s peach-blossom face became inscrutable and her deep blue eyes widened innocently.

“Is there going to be a surprise?” asked little Mary in her sweet high voice.

“Is that what the note was that came not long ago?” demanded Elinor.

“I knew you had something on your mind,” put in Billie. “I can always tell.”

“It must be a perfectly delightful secret,” observed Nancy, “because we are to wear our best clothes.”

“But what is it?” they demanded, dancing around the charming little woman in an ecstasy of curiosity.

“If I told you, my dears, you wouldn’t get a wink of sleep for excitement.”

“But we are just as excited from not knowing,” cried Billie.

“Perhaps it’s tickets to the opera,” guessed Elinor, her thoughts always on music.

“It must be a dinner party,” said Nancy.