More 'satiable curtiosity, Ian (I agree, knowing the context means you bring more to the song when you sing it):
Whom did the miller steal corn from? If it was his mill, wasn't it his grain? Or did people hire him to grind it for them, so it was their grain?
Similarly, from whom did the weaver steal yarn, since this is presumably a pre-industrial song, and he's not got a factory owner to steal from?
Ditto the tailor...
What say you? Or are you really tired of this?