The "missing verse" is the one taken from the book of words that go with the pithead in the fern cd, and according to the copyright info on that booklet the words were written by John Warner, but for some reason John Warner doesn't sing that verse on the cd.
The verse as written in the book is:

A mile inland as our path was laid
And where are you my Annie?
We found a government stockade
Long deserted but stoutly made

Jude