When the office door opened suddenly I knew the game was up. It had been a money-maker-but it was all over. As the cop walked in I sat back in the chair and put on a happy grin. He had the same somber expression and heavy foot that they all have-and the same lack of humor. I almost knew to the word what he was going to say before he uttered a syllable. "James Bolivar diGriz I arrest you on the charge-" I was waiting for the word charge, I thought it made a nice touch that way. As he said it I pressed the button that set off the charge of black powder in the ceiling, the crossbeam buckled and the three ton sa