"Hey, Russ! Where are you?"

"Back here! Come on!" answered Russ, laying aside his pipe.

"Who is it?" asked Rose.

"It's Sammie Brown, the boy we met the other day when we went to
Nantasket Beach," Russ explained. "He lives about two blocks from here,
and I told him to come over and see us. Here he is now!" and he pointed
to a boy, about his own age, who was coming up the walk.

"Hello, Sammie!" greeted Russ. "Want to blow bubbles?"

"Yes," was the answer, and a pipe was found for Sammie. He seemed to
know how to use it, for he blew bubbles bigger than any one else.

"What's inside the bubbles?" asked Violet, who simply had to ask another
question. "Is it water?"

"No, it's air," said Sammie. "If you could blow a bubble big enough to
get inside of you could breathe the air, just like outside. Only when it
was all breathed up you'd have to get more."

"Would you, really?" asked Rose.

"Sure," Sammie answered.

"How do you know?" Violet questioned.