the thing out," went on Frank, "and I've come to the conclusion that those fellows wanted us to see them go into that alley."
There was an exclamation of surprise from his comrades.
"Come again," said Billy. "I don't get you."
"Why should they want us to see them?" queried Bart. "They might have known that we'd go in after them."
"Sure they did!" answered Frank. "That's just what they wanted. They figured that they'd get us all in there in a bunch. They guessed too that, not finding them, we'd flash a light. That would make us a good target to their confederates who had come to the mouth of the alley, and they thought they could mow us down with one volley. In other words the alley was a trap."
"By ginger, I believe you're right!" exclaimed Bart "The shots came just after the light was flashed. It was a slick trick. You have to hand it to them."
"But that doesn't explain where the men disappeared to who went into the alley first," remarked Billy.