Chapter 17 A FAINT CLEW

"What's the trouble, Stirling?" inquired Silas Green, as Bart stood silently thinking out the problem set before him. "You seem sort of disappointed to find Wacker here. If you didn't think he was here, why did you come inquiring for him?"

"I knew he came here last night," said Bart. "Mrs. Wacker told me so."

"Do you want to see him?"

"No,