"Good-morning," said Fox cheerfully.
The professor turned, giving Fox one of his smiles which was not a smile at all. If the professor had chanced to turn one of those smiles upon a too confiding dog, the dog would have put his tail between his legs and run. Vivisection came after.
"Good-morning," said the professor acidly. "I shall be obliged to delay our session for an hour."
"Very well, sir, whenever it is convenient for you." And Fox smiled cheerfully again.
The professor turned once more. His eyes were bloodshot, he was unshaven, and—well, tousled. In short, the professor looked as if he had been sitting up all night. He had.
"You see," said Sally solemnly. Her father was out of hearing, as may be supposed.