“Who?”
“The people who have seen him before.”
For a time they rode in silence. Then Johnny spoke again.
“If there is any reward for all this work, Tillie McFadden gets half of it. She gave me the first good hunch.”
“What was the hunch?”
“That the man who set the fires wasn’t in the building when they were set.”
“You expect to prove that?”
“To-day.”
“With a mechanism?”
“No other mechanism than you’ll find in any building of consequence. Here we are!” he exclaimed suddenly.