“Let me see,” said Peggy. Jack gave her the glasses. She looked through them. “Yes,” she said. “He certainly does look sad. I’m not surprised, either, if he’s a prisoner!”
“Let’s wave to him!” said Jack suddenly. “He’ll be glad to see other children.” lack leaned right out of his window, and began waving violently.
At first the boy in the tower did not notice. Then Jack’s moving arm attracted his attention, and he stared. Jack almost fell out of the window, because he waved so hard. Peggy squeezed beside him and waved too. The boy smiled and waved back. First he put one hand out of the window and then both, and waved them like flags!
“Good! He’s seen us,” said Jack, pleased. “Now the next thing is - how are we going to find out who he is?”
Peggy had a good idea. “If we did some big letters in black ink, and held them up at the window one after the other, to spell out words, he would know we were friends!”
“Good idea!” said Jack. “It looks as if it’s going to be rainy to-night, so we could all come up here and do the letters then. Dimmy’s got a friend coming in to see her, I know, so she won’t mind us coming up here.”
“I wonder if she’s got some black ink,” said Peggy.
“We’ll ask her. I’ve got some sheets of drawing paper we can use.”
The little boy at the tower window suddenly disappeared and did not come back. “I expect somebody came into the tower room and he came away from the window in case they guessed that he was signalling to someone,” said Jack.
Mike and Nora came running in through the garden at that moment, for it was raining. They rushed up to the bedroom at the top of their tower to see why Jack hadn’t come down to the beach.