For what it's worth, the tune that carries Spancil Hill also appears to belong to some variants at least of the Scottish song Rarey's Hill (Roud no.6847, with a few examples assigned no.5558). Some tunes are included in vol. 6 of the Greig-Duncan Collection, but I don't have that one yet, so I don't know if any are relevant here; the coincidence of titles is interesting, though.