you have quite forgotten YOUR duty."

"My--duty?" Pollyanna's eyes were wide with wonder.

"Certainly. I know it is warm, but I consider it your duty to
keep your windows closed till those screens come. Flies,
Pollyanna, are not only unclean and annoying, but very dangerous
to health. After breakfast I will give you a little pamphlet on
this matter to read."

"To read? Oh, thank you, Aunt Polly. I love to read!"

Miss Polly drew in her breath audibly, then she shut her lips
together hard. Pollyanna, seeing her stern face, frowned a little
thoughtfully.

"Of course I'm sorry about the duty I forgot, Aunt Polly," she
apologized timidly. "I won't raise the windows again."

Her aunt made no reply. She did not speak, indeed, until the meal
was over. Then she rose, went to the bookcase in the sitting
room, took out a small paper booklet, and crossed the room to her
niece's side.

"This is the article I spoke of, Pollyanna. I desire you to go to
your room at once and read it. I will be up in half an hour to
look over your things."

Pollyanna, her eyes on the illustration of a fly's head, many
times magnified, cried joyously: