The Hunting of the Snark by Lewis Carroll
Fit the fourth: The hunting
The Bellman looked uffish, and wrinkled his brow.
"If only you'd spoken before!
It's excessively awkward to mention it now,
With the Snark, so to speak, at the door!
"We should all of us grieve, as you well may believe,
If you never were met with again --
But surely, my man, when the voyage began,
You might have suggested it then?