Without preamble, the door swung open with a rush and a man ran into the office. He was waving a paper in one hand, but this was not the only evidence of his excitement; aside from the waved paper and his obviously breathless appearance, the man spoke as soon as he was within sight of the other man behind the desk. "Professor Milton has resigned!" The man behind the desk smiled resignedly. "Don't be too concerned, Doctor Harris. Professor Milton has resigned before; he always comes back." Doctor