To throw in a bit of spare obscurity, it is a folk song of some sort - the original House of the Rising Son has the lyrics 'it's been the ruin of many a poor GIRL' but is probably no older than about a hundred years. A good search of the internet will turn things up. Tunes are harder to pin down, because they get re-used so often. It could be based on a far older tune, but it certainly predates the sixties.

Now argue it out. That's all I know, but at least I said it.

DNA