Henrietta Porter receives a letter from Harry Keller who was just released from prison warning the town of Porter to stay away from Hoby because Harry is coming to kill Hoby in revenge for killing his brother. Making things worse, Hoby doesn't even know what Keller looks like.
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But if Keller's coming, he's coming after me. I'll wait for him. That's all.
And how will you know 'im?
By the gun he shoots at me with.