"Huh!" Hemming tossed her head contemptuously, and strode from the room.
Vance rose at once and rang again for Sproot.
"Did you know Doctor Von Blon was here last night?" he asked when the butler appeared.
The man shook his head.
"No, sir. I was quite unaware of the fact."
"That's all, Sproot. And now please tell Miss Sibella we'd like to see her."
"Yes, sir."
It was fifteen minutes before Sibella put in an appearance.
"I'm beastly lazy these days," she explained, settling herself in a large chair. "What's the party for this morning?"
Vance offered her a cigarette with an air half quizzical and half deferential.
"Before we explain our presence," he said, "please be good enough to tell us what time Doctor Von Blon left here last night?"
"At a quarter of eleven," she answered, a hostile challenge coming into her eyes.
"Thank you. And now I may tell you that both your mother and Ada have been poisoned."
"Mother and Ada poisoned?" She echoed the words vaguely, as if they were only half intelligible to her; and for several moments she sat motionless, staring stonily out of flintlike eyes. Slowly her gaze became fixed on Markham.
"I think I'll take your advice," she said. "I have a girl chum in Atlantic City. . . . This place is really becoming too, too creepy." She forced a faint smile. "I'm off for the seashore this after-
