"You are under arrest," said the officer briefly.
Mrs. Paine and Mrs. Crawford attempted to reach their sons, but the soldiers barred their progress.
"Don't worry, mother," said Hal, as they were led by, and he smiled.
Uncle John caught the smile and a great light dawned upon him.
"Well, by George!" he said to himself, "I didn't think they had it in 'em."
He allayed the fears of the anxious mothers by telling them what he had discovered.
CHAPTER XXII.
INTO THE UNDERWORLD.
Hal did not see the look of understanding upon Uncle John's face, as they were led along, but Chester did. He smiled to himself.
"Uncle John has caught on," he said to his friend.