"I'll explain," replied the hardware man, leading the way to the street. Everyone followed him and the crowd at the windows joined the group outside. "Of course you mustn't shoot in the main street, for you might hit some one, or break windows; but back of this row of buildings is a lane that is perfectly clear. You will stand back to back in the center of the block and then, at my word, you will each march to the end of the block and pass around the buildings to the lane. As soon as you come in sight of one another you are privileged to fire, and I suppose Bill Sizer will try to kill you, Mr. Weldon, on the spot, and therefore you will try to kill him first."