You may seek it thimbles - and seek it with care;
You may hunt it with forks and hope;
You may threaten its life with a railway-share
You may charm it with smiles and soap ---
But oh, beamisch nephew, beware of the day,
If your snark be a Boojum! For then
You will softly and suddenly vanish away,
and never be met with again!
Lewis Carrol, "The Hunting of THE SNARK".