The version I know of "Waiting the Boatman" is not to the tune of "Seneca Square Dance" (maybe vaguely, at best).
My friends in Iowa used to call it "Give Me Back My Fifteen Cents"; I've heard people say that they are the same tune, and others say that they are similar but different tunes, so I don't know if that's helpful. I've never heard words to it, at least not as "Seneca Square Dance".
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