Because I could not stop for Gilligan

Okay, I know that Amazing Grace can be sung to the tune of Yellow Rose of Texas (and vice versa), but how have I come so far without knowing the Interchangeables list also includes House of the Rising Sun, Advance Australia Fair, While Shepherds Watched Their Flocks By Night, and Gilligan's Island? And that much of Emily Dickinson's poems can be sung to them too?

Obligatory Youtubery: Blind Boys of Alabama do Amazing Grace to House of the Rising Sun.
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