Johnson's Antidote, by Banjo Paterson

Some excerpts:

Johnson was a free-selector, and his brain went rather queer,
For the constant sight of serpents filled him with a deadly fear;
So he tramped his free-selection, morning, afternoon, and night,
Seeking for some great specific that would cure the serpent's bite.

.........
It will bring me fame and fortune! In the happy days to be,
Men of every clime and nation will be round to gaze on me --
Scientific men in thousands, men of mark and men of note,
Rushing down the Mooki River, after Johnson's antidote.
It will cure Delirium Tremens, when the patient's eyeballs stare
At imaginary spiders, snakes which really are not there.
When he thinks he sees them wriggle, when he thinks he sees them bloat,
It will cure him just to think of Johnson's Snakebite Antidote.'

.........

And the scientific person hurried off with utmost speed,
Tested Johnson's drug and found it was a deadly poison-weed;
Half a tumbler killed an emu, half a spoonful killed a goat,
All the snakes on earth were harmless to that awful antidote.