Very angrily he slammed up the receiver and pushed at the door. A minute or so later his anger had visibly increased. It was too dark in the booth to examine the latch with any hope of discovering the trouble. There was nothing for it but to raise his voice in a demand for release, which he did. Unfortunately, however, it is very doubtful if there was a living soul from one end of Oxford Hall to the other. Eventually, perhaps ten minutes after he had unsuspectingly entered the booth, the plan of breaking open the door occurred to him. He tried it. The telephone company, however, had caused that booth to be constructed of exceedingly strong materials, and finally Gibson, very warm and breathless, gave up the attempt. Next he considered breaking the glass. There were several panes and he could take his choice. But while he had not hesitated to try to force the lock or wreck a panel the idea of breaking glass struck him as peculiarly destructive and he paused to consider. And at about that time it occurred to him that a very simple way of escape confronted him. He snatched down the receiver and explained his predicament to a sympathetic Central.