Try contacting the Vaughan Williams Memorial Library at the English Folk Dance and Song Society. If it's not online, they can always photocopy and send it to you for a fee. (Sorry, don't have the link at the moment)

The song was collected from Henry Burstow the Horsham meistersinger. I wonder if Lucy only published 3 verses because the rest were dross? The other alternative, of course, is the possibility that they were not "nice" for singing in polite company, since the book was produced for consumption by the parlour ballad piano playing and recital orientated middle classes of the time ! (:-) I sing the three verses myself, and think the tune is quite appealing.