Chris,

Rather than "straying," the point is that Dennis Smith's 10th and last verse shows in the use of "Spencervania" that someone in the disemination process corrupted not one but two place names, which were probably England and Pennsylvania originally.

In case you don't have Miss Creighton's book (cited by Malcolm above), the 9th verse is

I wish I was as far as Ingo
Way out across the briny sea,
A-sailing over the deep blue water
Where love nor care never trouble me.

All the best,
Dan