There is another, excellent version that I don't think anyone has mentioned yet - by Doris Henderson & John Renbourn. Before he formed Pentangle, John R made an album (or was it two?) with an American singer, Doris H, who was resident in London in the mid 1960s. It (just) predates) the first Fairport recordings, so I don't know if they'd heard it - Rembourn was an influential figure in that milieu.