The twins were not musical. They only sang from principle, to emphasize their light-heartedness when it needed special impressing.
Prudence's brows knitted in anxious frowns, and she sighed a few times.
"What is the matter, Prue? You look like a rainy Christmas," said Fairy.
"It's the twins," was the mournful answer.
"The twins!" ejaculated Fairy. "Why, they've acted like angels lately."
Even Aunt Grace lifted mildly inquiring eyebrows.
"That's it!—That's just it. When the twins act like angels I get uneasy right away. The better they act, the more suspicious I feel."
"What have they been doing?"
"Nothing! Not a thing! That's why I'm worried. It must be something terrible!"
Fairy laughed and returned to her embroidery. Aunt Grace smiled and began plying her needles once more. But Prudence still looked troubled, and sighed often.