"If I did it would be an indication?"
"Granted it's your custom, what is there to tempt you to-night?"
Bobby answered, half jesting:
"You've not forgotten Robinson on the library sofa. The man isn't exactly working for me. Tonight he seems almost as unfriendly as Howells was."
He yawned.
"I ought to sleep now if ever. I've seldom been so tired. Two such nights!"
He hesitated.
"But I am glad you're here, Hartley. I can go to sleep with a more comfortable feeling."
"Don't worry," Graham said. "You'll sleep quietly enough, and we'll all be better for a good rest."
For only a little while they talked of the mystery. While Graham regretted his failure to find any trace of Maria, their voices dwindled sleepily. Bobby recalled his last thought before losing himself last night. He tried to force from his mind now the threat in Robinson's eyes. He told himself again and again that the man wasn't actually unfriendly. Then the blackness encircled him. He slept.