There are a number of early C20 versions in the Greig-Duncan Collection (vol VII, number 1396) which make it pretty clear that the word was Boghead; as pointed out earlier, it was common to refer to farmers by the name of the land they farmed; still is in some places.

You're unlikely to find the song in any old books. Most of the list above are commercial arrangements recorded by modern revival performers, so not likely to help. The notes to G-D VII include the following (page 518) from Gavin Greig's MS:

'Written originally by John Geddes, foreman at Boghead of Cairnie, fifty-four years ago. Believed to have been himself here. Copy from G. Stevenson, Mill of Towie, Auchindochy, Keith. Extracted from Farm Servant Magazine 1913.'

The editors also quote information supplied by Peter Hall, as follows:

'Isabel Morison, the heroine of this song, was born at Boghead, 20 September 1823, as the daughter of Alexander Morison (Old Parish Register, Cairnie). She again appears at Boghead in the census of 1841. Her illegitimate son, James, was born on 16 June 1843, the father being James Stephen from the parish of Glass(OPR, Cairnie). In the census of 1851, the son was living with his paternal uncle in the parish of Glass, lending credence to the versions of the song which have the father remove the child from the maternal home. Isabel Morrison [sic] is no longer at Boghead in 1851.'

A locally made song, though set to older tunes; in the early C20 it seems that some of the people involved were still remembered, though local tradition may have confused their identities a bit. The versions in G-D that mention lamps mostly have them as naptha lamps, incidentally; I don't know why Paul Graney insisted on 'ladles'. Perhaps he wasn't aware of those older examples.