The Town Clock That Chimed Thirteen
On Tuesday at noon, the old clock on the library tower did something strange. It chimed thirteen times. Nina was eating lunch on the steps, and she counted every bong twice to be sure.
"Clocks do not make mistakes," said the librarian. "Somebody must have changed it."
Nina did not think so. She looked at the tower door, and it was locked tight. So she climbed the narrow stairs with the librarian's key and went inside. The gears turned slowly, clicking and humming. Near the big bell, Nina noticed a few dry twigs stuck between two wheels.
She looked up and saw a small nest tucked in a corner. A sparrow sat on the edge, watching her. The bird had been carrying twigs in through a broken window, and one had fallen into the machinery.
Nina pulled out the twigs with a long wooden spoon from her lunch bag. The gears clicked back into their proper rhythm. Then she asked the librarian to cover the window with a bit of wire, leaving a little gap for the sparrow's front door.
At one o'clock the clock chimed exactly once.