"No," admitted Frank. "And it doesn't explain either where the men who fired the shots vanished to. But there's an answer to everything, and I'm going to try to find the answer to this. I'm not going to drop it. Of course, I suppose the secret service men will take the thing up, but I'm going to do a little investigating on my own account. I have a hunch that when I take a look at that alley by daylight, I'll tumble to something."

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