One (0) of the simplest cases Inspector Harper (1) ______to solve was a bank robbery which took (2) _______ in Leeds in 1968. When he arrived (3) ____ the scene of the crime, the cashier explained to him (4) ____ had happened. A tall man in a blue anorak and a motorcycle helmet had walked (5) _____ the bank that morning and passed the cashier an envelope (6) ______ these words written on the back: “I have a gun. Hand over all the money and no one (7) _____ get hurt.” The cashier saw that the man really (8) _____have a gun, and dutifully gave him all the money he had behind the counter. Then the robber put the cash in his bag and ran (9) ______ of the door, to the sound of alarm bells. An hour (10) _____ the robber was in his house, counting his money, (11) ______Inspector Harper burst through the front door, accomponied (12) ________ four large policemen. The poor criminal (13) _____ astonished at the speed and efficiency of the West Yorkshire Police. “How did you know (14) _____ was me?” he asked (15) ______amazement. “Simple, Mr Briggs,” smiled the Inspector. “Your name and address were written on the front of the envelope!”