You can find the tune (one of them at least) at Pretty Saro (http://www.contemplator.com/folk6/saro.html).

Interesting variations. Vance Randolph also has the song In Eighteen Hundred and Forty-Nine in Vol. 4 - says it took parts of Pretty Saro and Jack of Diamonds as well. The version I have of PS doesn't have the verse about wishing to be a dove - which is similar to Fair and Tender Ladies... Seems like much cross pollination is going on and isn't likely to be all sorted out. Such is both the pleasure and frustration of folk music...