Sebastian's hand was raised, and he was just about to pierce the delicate white skin, when, with a sudden, quick scream of terror, she snatched her hand away hastily.
The Professor let the needle drop in his astonishment.

"What did you do that for ?" he cried, with an angry dart of the keen eyes.

"This is not the first time I have drawn your blood.

You KNEW I would not hurt you." Hilda's face had grown strangely pale.

But that was not all.