"Do you remember what night that party was held, Lily?" asked Laura.
"Why, no. On a Saturday night, I believe."
"Quite so. And on a particular Saturday night," said Laura.
"You said it!" murmured Bobby.
"I don't know what you mean!" cried Lily Pendleton.
"But you will before I get through with you," said Laura. "Now, listen! You know about that man who had his leg broken on Market Street?"
"The one the police say Purt ran down with his car?"
"The same."
"Of course I do," Lily cried. "And Purt is as innocent as you are!"
"Granted," said Laura. "Therefore you will help us explain the mystery, and so relieve Purt Sweet of suspicion. For he refuses to say anything himself to the police."