Thanks, Barbara. I think that's a better link than mine. The best I've been able to find is that the "Sacred Harp" source suggests that the Mormon lyrics were written to fit the tune in 1846, but that the tune was written in 1844 to fit lyrics written in 1842. The problem I have with that is that the meter is odd (do folk sources ever count meters like hymnodists do?) and I can't imagine a poet in 1842 writing a poem in that meter without a tune in his head for it to go with