"He's mad about something," said Bob. "Probably because she lost that piece of paper."
"That'll prove to him they're being watched."
"I wonder if they suspect us."
"Let's hope not, yet," said Hugh earnestly. "There they go," he added a moment later, as Lena and the fake detective started down the street. They still were talking excitedly together and it was hard to tell from their manner whether the man was threatening Lena or pleading with her.
"Another chase, I suppose," sighed Bob. "I'm getting tired."
"Not a chase on foot anyway," said Hugh, for just then the fake detective hailed a passing cab; he and Lena stepped into it and a moment later were being driven rapidly away.
CHAPTER XXIV
AT THE FACTORY
"Well," exclaimed Bob in dismay, "I guess they got rid of us that time."
"Why have they?" demanded Hugh. "Why can't we hire a cab and follow them?"