"Worse and more of it," he exclaimed.
Then he examined the car, trying to determine at which window he had been seated. Several were open, and he determined to try and speak to some one.
"Our seats are not far from here," he thought as he stopped under the second one. "I'll try this."
He picked up a stone about as big as an egg and tossed it into the window. A howl from a child followed the act and Billie ducked under the car. He could hear the mother pacifying it, but evidently she, too, had been asleep and had not discovered the stone.
"I think I know just which child it is," said Billie with a grin, "and this next open window must be ours."
He picked up another stone and tossed it in to his second choice, this time with better results.
Donald had just aroused from a nap, and, missing Billie, was looking for him. Not seeing him in the car, he was about to look out of the window when the stone hit him on the chin.
"Ouch!" he exclaimed as he started back.
Billie heard the exclamation and gave the familiar whistle.
Donald was on the alert in an instant. Looking up and down the car to be sure he was not being watched, he stuck his head out of the window.