This afternoon I was listening to Mary Humphreys's No My Love, Not I on Music Well, and fell to wondering why I always misremember the lyrics. One line in particular - if I sing the chorus, it always comes out as

"There's a worm in my father's garden, and some do call it rue"

instead of 'herb'. Which makes no sense at all, as well as not being a very pleasant image.

The mystery was solved when I remembered this. Some eerie similarities, I think you'll agree. I wonder if the song originated as a tribute to No My Love, Not I - perhaps composed by someone who hadn't actually heard it but had met someone who raved about it:

"Brilliant song, got a great chorus, it goes... hang on... something, something, There's a... yes, that's it,
There's a er... la la la la garden,
And erm... da da da da rue
Think it's 'rue'. Something 'ooh', definitely. Great song."

(Yes, I have got more important things to do, why do you ask?)