I've got a version of this song from a book called The Cape Breton Songster, published in 1935 in Sydney, NS. It's described as being on the tune of Mo rùin geal dileas and follows the Gaelic lyrics, but notes that the English words are "in no sense a translation" of the Gaelic. The lyrics are similar to the Helen Creighon version but with the following verse:

Peter Edwards and Duncan Rory
The damnedest shavers you ever see
A-spearing eels in the month of April
And starving slaves out on Scatterie

A pair of brogans is a pair of shoes, from the Scottish Gaelic. This song is still sung in Cape Breton.