"And you weren't near the post office?"
"Oh, yes, I was only a few hundred feet away when the explosion took place."
"There, didn't I say I saw him in the crowd?" exclaimed Uriah, eagerly.
"What were you doing in the crowd?"
"I wanted to see what was up."
"You didn't stay very long," said the constable, dryly.
"I couldn't. Mother was waiting for me."
"You are quite sure you weren't in the post office just before the explosion occurred?"
"Why, of course I wasn't in the place! What are you driving at?"
"We found the pocketknife in the building—found it not ten feet from the wrecked safe. It had been used, evidently, for ripping open some sealed packages."