Lyric discussion by Number3Pencils 

I think I can explain where the louse came from.

The Fleet Foxes apparently are familiar with Lushootseed, the native language of the Seattle area, because they use a Lushootseed place name, Xachua'bsh, on a website of theirs (on BandMine). Probably the most widely known of the stories of Lushootseed is the story of Lady Louse. It's a very short one:

Lady Louse lived there in that great big house! All alone. She had no friends or relatives. Then she took it. And she swept it. That great big house. There was lots of dirt! When she got to the very middle of the house, she got lost! That was the end of Lady Louse! That is the end.

(I got the text from an article in the Seattle Times–I don't think links are allowed, but it's a quick Google, and there's a recording of it in Lushootseed and English there too.)

The words "louse lived there" are really recognizable from the story, and I don't think they're a coincidence.

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