"It's too dangerous I tell you," she heard the owner of the tire shop say. "The police are getting wise. And only a day or so ago Nichols sent his daughter around here to spy."

"I'll deal with her," Brunner promised. "She's getting too curious for her own good."

"After tonight I'm through," the other insisted. "The little I make isn't worth the risk I take."

Penny could not hear Brunner's reply. He seemed to be arguing with the tire shop owner. She felt elated and excited at the information she had gleaned.

After tonight! The words burned into her mind. What coup were the two men planning for that evening? If only she might learn!

Could it be that Brunner was involved in the auto accessory thefts? It was generally believed that the disreputable owner of the tire shop made a practice of receiving stolen goods. Why then, should a man in Brunner's position stoop to have dealings with such a person unless he too were guilty?

The evidence against the two was purely circumstantial, that Penny plainly realized. It seemed ridiculous to connect Brunner with the underworld and yet the very fact that no suspicion had ever been attached to him offered a measure of safety for his dishonorable activities.

"Dad warned me that one must move cautiously in trying to gather evidence against influential citizens," Penny reasoned. "Yet, if I wait until I can talk it over with him, it may be too late."

Brunner's automobile was moving away from the curbing. Penny did not have a minute to debate. The instant that the tire shop owner vanished inside his store, she darted to her own car.

Already Brunner was far up the street, but by speeding she managed to approach close enough to keep him within sight.