"When I entered the room the doctor was saying as how he thought it would be a good thing for the young ladies to get some fresh air; and Miss Sibella said she'd had enough fresh air."
"And Miss Ada?"
"I don't remember her saying anything, sir."
"And they went out to the car while you were here?"
"Yes, sir. I opened the door for them."
"And did Doctor Von Blon go in the car with them?"
"Yes. But I believe they were to drop him at Mrs. Riglander's, where he had a professional call to make. From what he said as he went out I gathered that the young ladies were then to take a drive, and that he was to call here for the car after dinner."
"What!" Vance stiffened, and his eyes burned upon the old butler. "Quick, Sproot! Do you know where Mrs. Riglander lives?"
"On Madison Avenue in the Sixties, I believe."
"Get her on the phone—find out if the doctor has arrived."
I could not help marvelling at the impassive way in which the man went to the telephone to comply with this astonishing and seemingly incomprehensible request. When he returned his face was expressionless.
"The doctor has not arrived at Mrs. Riglander's, sir," he reported.
"He's certainly had time," Vance commented, half to himself. Then: "Who drove the car when it left here, Sproot?"
"I couldn't say for certain, sir. I didn't notice
