She pointed to a sentence upon the tent.

Roughly it means 'Gratitude is the debt of hospitality.' I am very much afraid that the young lady must have been listening to our conversation a while ago." Lenora shivered.
"To think of any girl," she murmured, "caring for a fiend like Craig!" Before they knew it she was there again, her eyes on fire, her tone shaking.
"You call him evil, he who saved your lives, who saved you from the swords of my soldiers!" she cried.

"I wish that you had all died before you came here.

I hope that you yet may die!" She passed away into the night.

The Professor looked anxiously after her.
"It is a humiliating reflection," he said, "but we are most certainly in Craig's power.