SLIPPY MCGEE.

The title is also the moniker of a renowned safe-cracker, Slippy McGee, who has always managed to evade capture until his latest job. He escapes aboard a freight train, bound for parts unknown, and finds himself in the town of Appleborro. He becomes interested in the local butterflies, De Rance's hobby, and becomes so knowledgeable in them that he becomes a published expert.